21970620

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:129

約数の個数: 216

約数和(自身を含む): 80668224

約数和(自身を除く): 58697604

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 47, 49, 53, 60, 63, 70, 84, 90, 94, 98, 105, 106, 126, 140, 141, 147, 159, 180, 188, 196, 210, 212, 235, 245, 252, 265, 282, 294, 315, 318, 329, 371, 420, 423, 441, 470, 477, 490, 530, 564, 588, 630, 636, 658, 705, 735, 742, 795, 846, 882, 940, 954, 980, 987, 1060, 1113, 1260, 1316, 1410, 1470, 1484, 1590, 1645, 1692, 1764, 1855, 1908, 1974, 2115, 2205, 2226, 2303, 2385, 2491, 2597, 2820, 2940, 2961, 3180, 3290, 3339, 3710, 3948, 4230, 4410, 4452, 4606, 4770, 4935, 4982, 5194, 5565, 5922, 6580, 6678, 6909, 7420, 7473, 7791, 8460, 8820, 9212, 9540, 9870, 9964, 10388, 11130, 11515, 11844, 12455, 12985, 13356, 13818, 14805, 14946, 15582, 16695, 17437, 19740, 20727, 22260, 22419, 23030, 23373, 24910, 25970, 27636, 29610, 29892, 31164, 33390, 34545, 34874, 37365, 38955, 41454, 44838, 46060, 46746, 49820, 51940, 52311, 59220, 66780, 69090, 69748, 74730, 77910, 82908, 87185, 89676, 93492, 103635, 104622, 112095, 116865, 122059, 138180, 149460, 155820, 156933, 174370, 207270, 209244, 224190, 233730, 244118, 261555, 313866, 348740, 366177, 414540, 448380, 467460, 488236, 523110, 610295, 627732, 732354, 784665, 1046220, 1098531, 1220590, 1464708, 1569330, 1830885, 2197062, 2441180, 3138660, 3661770, 4394124, 5492655, 7323540, 10985310, 21970620]

約数ペア:

[(1, 21970620), (2, 10985310), (3, 7323540), (4, 5492655), (5, 4394124), (6, 3661770), (7, 3138660), (9, 2441180), (10, 2197062), (12, 1830885), (14, 1569330), (15, 1464708), (18, 1220590), (20, 1098531), (21, 1046220), (28, 784665), (30, 732354), (35, 627732), (36, 610295), (42, 523110), (45, 488236), (47, 467460), (49, 448380), (53, 414540), (60, 366177), (63, 348740), (70, 313866), (84, 261555), (90, 244118), (94, 233730), (98, 224190), (105, 209244), (106, 207270), (126, 174370), (140, 156933), (141, 155820), (147, 149460), (159, 138180), (180, 122059), (188, 116865), (196, 112095), (210, 104622), (212, 103635), (235, 93492), (245, 89676), (252, 87185), (265, 82908), (282, 77910), (294, 74730), (315, 69748), (318, 69090), (329, 66780), (371, 59220), (420, 52311), (423, 51940), (441, 49820), (470, 46746), (477, 46060), (490, 44838), (530, 41454), (564, 38955), (588, 37365), (630, 34874), (636, 34545), (658, 33390), (705, 31164), (735, 29892), (742, 29610), (795, 27636), (846, 25970), (882, 24910), (940, 23373), (954, 23030), (980, 22419), (987, 22260), (1060, 20727), (1113, 19740), (1260, 17437), (1316, 16695), (1410, 15582), (1470, 14946), (1484, 14805), (1590, 13818), (1645, 13356), (1692, 12985), (1764, 12455), (1855, 11844), (1908, 11515), (1974, 11130), (2115, 10388), (2205, 9964), (2226, 9870), (2303, 9540), (2385, 9212), (2491, 8820), (2597, 8460), (2820, 7791), (2940, 7473), (2961, 7420), (3180, 6909), (3290, 6678), (3339, 6580), (3710, 5922), (3948, 5565), (4230, 5194), (4410, 4982), (4452, 4935), (4606, 4770)]