18276820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 39747456

約数和(自身を除く): 21470636

約数列:

[1, 2, 4, 5, 10, 20, 61, 71, 122, 142, 211, 244, 284, 305, 355, 422, 610, 710, 844, 1055, 1220, 1420, 2110, 4220, 4331, 8662, 12871, 14981, 17324, 21655, 25742, 29962, 43310, 51484, 59924, 64355, 74905, 86620, 128710, 149810, 257420, 299620, 913841, 1827682, 3655364, 4569205, 9138410, 18276820]

約数ペア:

[(1, 18276820), (2, 9138410), (4, 4569205), (5, 3655364), (10, 1827682), (20, 913841), (61, 299620), (71, 257420), (122, 149810), (142, 128710), (211, 86620), (244, 74905), (284, 64355), (305, 59924), (355, 51484), (422, 43310), (610, 29962), (710, 25742), (844, 21655), (1055, 17324), (1220, 14981), (1420, 12871), (2110, 8662), (4220, 4331)]