21138156

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{47}}^1$

素因数の和:132

約数の個数: 108

約数和(自身を含む): 60723936

約数和(自身を除く): 39585780

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 31, 36, 39, 47, 52, 62, 78, 93, 94, 117, 124, 141, 156, 186, 188, 234, 279, 282, 372, 403, 423, 468, 558, 564, 611, 806, 846, 961, 1116, 1209, 1222, 1457, 1612, 1692, 1833, 1922, 2418, 2444, 2883, 2914, 3627, 3666, 3844, 4371, 4836, 5499, 5766, 5828, 7254, 7332, 8649, 8742, 10998, 11532, 12493, 13113, 14508, 17298, 17484, 18941, 21996, 24986, 26226, 34596, 37479, 37882, 45167, 49972, 52452, 56823, 74958, 75764, 90334, 112437, 113646, 135501, 149916, 170469, 180668, 224874, 227292, 271002, 340938, 406503, 449748, 542004, 587171, 681876, 813006, 1174342, 1626012, 1761513, 2348684, 3523026, 5284539, 7046052, 10569078, 21138156]

約数ペア:

[(1, 21138156), (2, 10569078), (3, 7046052), (4, 5284539), (6, 3523026), (9, 2348684), (12, 1761513), (13, 1626012), (18, 1174342), (26, 813006), (31, 681876), (36, 587171), (39, 542004), (47, 449748), (52, 406503), (62, 340938), (78, 271002), (93, 227292), (94, 224874), (117, 180668), (124, 170469), (141, 149916), (156, 135501), (186, 113646), (188, 112437), (234, 90334), (279, 75764), (282, 74958), (372, 56823), (403, 52452), (423, 49972), (468, 45167), (558, 37882), (564, 37479), (611, 34596), (806, 26226), (846, 24986), (961, 21996), (1116, 18941), (1209, 17484), (1222, 17298), (1457, 14508), (1612, 13113), (1692, 12493), (1833, 11532), (1922, 10998), (2418, 8742), (2444, 8649), (2883, 7332), (2914, 7254), (3627, 5828), (3666, 5766), (3844, 5499), (4371, 4836)]