21666708

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{677}}^1$

素因数の和:821

約数の個数: 72

約数和(自身を含む): 63178752

約数和(自身を除く): 41512044

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 127, 252, 254, 381, 508, 677, 762, 889, 1143, 1354, 1524, 1778, 2031, 2286, 2667, 2708, 3556, 4062, 4572, 4739, 5334, 6093, 8001, 8124, 9478, 10668, 12186, 14217, 16002, 18956, 24372, 28434, 32004, 42651, 56868, 85302, 85979, 170604, 171958, 257937, 343916, 515874, 601853, 773811, 1031748, 1203706, 1547622, 1805559, 2407412, 3095244, 3611118, 5416677, 7222236, 10833354, 21666708]

約数ペア:

[(1, 21666708), (2, 10833354), (3, 7222236), (4, 5416677), (6, 3611118), (7, 3095244), (9, 2407412), (12, 1805559), (14, 1547622), (18, 1203706), (21, 1031748), (28, 773811), (36, 601853), (42, 515874), (63, 343916), (84, 257937), (126, 171958), (127, 170604), (252, 85979), (254, 85302), (381, 56868), (508, 42651), (677, 32004), (762, 28434), (889, 24372), (1143, 18956), (1354, 16002), (1524, 14217), (1778, 12186), (2031, 10668), (2286, 9478), (2667, 8124), (2708, 8001), (3556, 6093), (4062, 5334), (4572, 4739)]