20981844

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{419}}^1$

素因数の和:549

約数の個数: 72

約数和(自身を含む): 57788640

約数和(自身を除く): 36806796

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 107, 117, 156, 214, 234, 321, 419, 428, 468, 642, 838, 963, 1257, 1284, 1391, 1676, 1926, 2514, 2782, 3771, 3852, 4173, 5028, 5447, 5564, 7542, 8346, 10894, 12519, 15084, 16341, 16692, 21788, 25038, 32682, 44833, 49023, 50076, 65364, 89666, 98046, 134499, 179332, 196092, 268998, 403497, 537996, 582829, 806994, 1165658, 1613988, 1748487, 2331316, 3496974, 5245461, 6993948, 10490922, 20981844]

約数ペア:

[(1, 20981844), (2, 10490922), (3, 6993948), (4, 5245461), (6, 3496974), (9, 2331316), (12, 1748487), (13, 1613988), (18, 1165658), (26, 806994), (36, 582829), (39, 537996), (52, 403497), (78, 268998), (107, 196092), (117, 179332), (156, 134499), (214, 98046), (234, 89666), (321, 65364), (419, 50076), (428, 49023), (468, 44833), (642, 32682), (838, 25038), (963, 21788), (1257, 16692), (1284, 16341), (1391, 15084), (1676, 12519), (1926, 10894), (2514, 8346), (2782, 7542), (3771, 5564), (3852, 5447), (4173, 5028)]