19787580

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{521}}^1$

素因数の和:747

約数の個数: 72

約数和(自身を含む): 60422544

約数和(自身を除く): 40634964

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 211, 422, 521, 633, 844, 1042, 1055, 1266, 1563, 1899, 2084, 2110, 2532, 2605, 3126, 3165, 3798, 4220, 4689, 5210, 6252, 6330, 7596, 7815, 9378, 9495, 10420, 12660, 15630, 18756, 18990, 23445, 31260, 37980, 46890, 93780, 109931, 219862, 329793, 439724, 549655, 659586, 989379, 1099310, 1319172, 1648965, 1978758, 2198620, 3297930, 3957516, 4946895, 6595860, 9893790, 19787580]

約数ペア:

[(1, 19787580), (2, 9893790), (3, 6595860), (4, 4946895), (5, 3957516), (6, 3297930), (9, 2198620), (10, 1978758), (12, 1648965), (15, 1319172), (18, 1099310), (20, 989379), (30, 659586), (36, 549655), (45, 439724), (60, 329793), (90, 219862), (180, 109931), (211, 93780), (422, 46890), (521, 37980), (633, 31260), (844, 23445), (1042, 18990), (1055, 18756), (1266, 15630), (1563, 12660), (1899, 10420), (2084, 9495), (2110, 9378), (2532, 7815), (2605, 7596), (3126, 6330), (3165, 6252), (3798, 5210), (4220, 4689)]