21105324

素因数分解:

$2^2\times 3^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:311

約数の個数: 72

約数和(自身を含む): 55648320

約数和(自身を除く): 34542996

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 41, 79, 82, 123, 158, 164, 181, 237, 246, 316, 362, 369, 474, 492, 543, 711, 724, 738, 948, 1086, 1422, 1476, 1629, 2172, 2844, 3239, 3258, 6478, 6516, 7421, 9717, 12956, 14299, 14842, 19434, 22263, 28598, 29151, 29684, 38868, 42897, 44526, 57196, 58302, 66789, 85794, 89052, 116604, 128691, 133578, 171588, 257382, 267156, 514764, 586259, 1172518, 1758777, 2345036, 3517554, 5276331, 7035108, 10552662, 21105324]

約数ペア:

[(1, 21105324), (2, 10552662), (3, 7035108), (4, 5276331), (6, 3517554), (9, 2345036), (12, 1758777), (18, 1172518), (36, 586259), (41, 514764), (79, 267156), (82, 257382), (123, 171588), (158, 133578), (164, 128691), (181, 116604), (237, 89052), (246, 85794), (316, 66789), (362, 58302), (369, 57196), (474, 44526), (492, 42897), (543, 38868), (711, 29684), (724, 29151), (738, 28598), (948, 22263), (1086, 19434), (1422, 14842), (1476, 14299), (1629, 12956), (2172, 9717), (2844, 7421), (3239, 6516), (3258, 6478)]