21665196

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{577}}^1$

素因数の和:743

約数の個数: 72

約数和(自身を含む): 63117600

約数和(自身を除く): 41452404

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 149, 252, 298, 447, 577, 596, 894, 1043, 1154, 1341, 1731, 1788, 2086, 2308, 2682, 3129, 3462, 4039, 4172, 5193, 5364, 6258, 6924, 8078, 9387, 10386, 12117, 12516, 16156, 18774, 20772, 24234, 36351, 37548, 48468, 72702, 85973, 145404, 171946, 257919, 343892, 515838, 601811, 773757, 1031676, 1203622, 1547514, 1805433, 2407244, 3095028, 3610866, 5416299, 7221732, 10832598, 21665196]

約数ペア:

[(1, 21665196), (2, 10832598), (3, 7221732), (4, 5416299), (6, 3610866), (7, 3095028), (9, 2407244), (12, 1805433), (14, 1547514), (18, 1203622), (21, 1031676), (28, 773757), (36, 601811), (42, 515838), (63, 343892), (84, 257919), (126, 171946), (149, 145404), (252, 85973), (298, 72702), (447, 48468), (577, 37548), (596, 36351), (894, 24234), (1043, 20772), (1154, 18774), (1341, 16156), (1731, 12516), (1788, 12117), (2086, 10386), (2308, 9387), (2682, 8078), (3129, 6924), (3462, 6258), (4039, 5364), (4172, 5193)]