20557960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{281}}^1$

素因数の和:382

約数の個数: 64

約数和(自身を含む): 48729600

約数和(自身を除く): 28171640

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 59, 62, 118, 124, 155, 236, 248, 281, 295, 310, 472, 562, 590, 620, 1124, 1180, 1240, 1405, 1829, 2248, 2360, 2810, 3658, 5620, 7316, 8711, 9145, 11240, 14632, 16579, 17422, 18290, 33158, 34844, 36580, 43555, 66316, 69688, 73160, 82895, 87110, 132632, 165790, 174220, 331580, 348440, 513949, 663160, 1027898, 2055796, 2569745, 4111592, 5139490, 10278980, 20557960]

約数ペア:

[(1, 20557960), (2, 10278980), (4, 5139490), (5, 4111592), (8, 2569745), (10, 2055796), (20, 1027898), (31, 663160), (40, 513949), (59, 348440), (62, 331580), (118, 174220), (124, 165790), (155, 132632), (236, 87110), (248, 82895), (281, 73160), (295, 69688), (310, 66316), (472, 43555), (562, 36580), (590, 34844), (620, 33158), (1124, 18290), (1180, 17422), (1240, 16579), (1405, 14632), (1829, 11240), (2248, 9145), (2360, 8711), (2810, 7316), (3658, 5620)]