18077960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{239}}^1$

素因数の和:342

約数の個数: 64

約数和(自身を含む): 42854400

約数和(自身を除く): 24776440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 61, 62, 122, 124, 155, 239, 244, 248, 305, 310, 478, 488, 610, 620, 956, 1195, 1220, 1240, 1891, 1912, 2390, 2440, 3782, 4780, 7409, 7564, 9455, 9560, 14579, 14818, 15128, 18910, 29158, 29636, 37045, 37820, 58316, 59272, 72895, 74090, 75640, 116632, 145790, 148180, 291580, 296360, 451949, 583160, 903898, 1807796, 2259745, 3615592, 4519490, 9038980, 18077960]

約数ペア:

[(1, 18077960), (2, 9038980), (4, 4519490), (5, 3615592), (8, 2259745), (10, 1807796), (20, 903898), (31, 583160), (40, 451949), (61, 296360), (62, 291580), (122, 148180), (124, 145790), (155, 116632), (239, 75640), (244, 74090), (248, 72895), (305, 59272), (310, 58316), (478, 37820), (488, 37045), (610, 29636), (620, 29158), (956, 18910), (1195, 15128), (1220, 14818), (1240, 14579), (1891, 9560), (1912, 9455), (2390, 7564), (2440, 7409), (3782, 4780)]