21281460

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{211}}^1$

素因数の和:305

約数の個数: 72

約数和(自身を含む): 61366368

約数和(自身を除く): 40084908

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 41, 60, 82, 123, 164, 205, 211, 246, 410, 422, 492, 615, 633, 820, 844, 1055, 1230, 1266, 1681, 2110, 2460, 2532, 3165, 3362, 4220, 5043, 6330, 6724, 8405, 8651, 10086, 12660, 16810, 17302, 20172, 25215, 25953, 33620, 34604, 43255, 50430, 51906, 86510, 100860, 103812, 129765, 173020, 259530, 354691, 519060, 709382, 1064073, 1418764, 1773455, 2128146, 3546910, 4256292, 5320365, 7093820, 10640730, 21281460]

約数ペア:

[(1, 21281460), (2, 10640730), (3, 7093820), (4, 5320365), (5, 4256292), (6, 3546910), (10, 2128146), (12, 1773455), (15, 1418764), (20, 1064073), (30, 709382), (41, 519060), (60, 354691), (82, 259530), (123, 173020), (164, 129765), (205, 103812), (211, 100860), (246, 86510), (410, 51906), (422, 50430), (492, 43255), (615, 34604), (633, 33620), (820, 25953), (844, 25215), (1055, 20172), (1230, 17302), (1266, 16810), (1681, 12660), (2110, 10086), (2460, 8651), (2532, 8405), (3165, 6724), (3362, 6330), (4220, 5043)]