21696220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{131}}^1$

素因数の和:180

約数の個数: 108

約数和(自身を含む): 57829464

約数和(自身を除く): 36133244

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 131, 140, 169, 182, 196, 245, 260, 262, 338, 364, 455, 490, 524, 637, 655, 676, 845, 910, 917, 980, 1183, 1274, 1310, 1690, 1703, 1820, 1834, 2366, 2548, 2620, 3185, 3380, 3406, 3668, 4585, 4732, 5915, 6370, 6419, 6812, 8281, 8515, 9170, 11830, 11921, 12740, 12838, 16562, 17030, 18340, 22139, 23660, 23842, 25676, 32095, 33124, 34060, 41405, 44278, 47684, 59605, 64190, 82810, 83447, 88556, 110695, 119210, 128380, 154973, 165620, 166894, 221390, 238420, 309946, 333788, 417235, 442780, 619892, 774865, 834470, 1084811, 1549730, 1668940, 2169622, 3099460, 4339244, 5424055, 10848110, 21696220]

約数ペア:

[(1, 21696220), (2, 10848110), (4, 5424055), (5, 4339244), (7, 3099460), (10, 2169622), (13, 1668940), (14, 1549730), (20, 1084811), (26, 834470), (28, 774865), (35, 619892), (49, 442780), (52, 417235), (65, 333788), (70, 309946), (91, 238420), (98, 221390), (130, 166894), (131, 165620), (140, 154973), (169, 128380), (182, 119210), (196, 110695), (245, 88556), (260, 83447), (262, 82810), (338, 64190), (364, 59605), (455, 47684), (490, 44278), (524, 41405), (637, 34060), (655, 33124), (676, 32095), (845, 25676), (910, 23842), (917, 23660), (980, 22139), (1183, 18340), (1274, 17030), (1310, 16562), (1690, 12838), (1703, 12740), (1820, 11921), (1834, 11830), (2366, 9170), (2548, 8515), (2620, 8281), (3185, 6812), (3380, 6419), (3406, 6370), (3668, 5915), (4585, 4732)]