18787960

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{419}}^1$

素因数の和:508

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 26572040

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 59, 76, 95, 118, 152, 190, 236, 295, 380, 419, 472, 590, 760, 838, 1121, 1180, 1676, 2095, 2242, 2360, 3352, 4190, 4484, 5605, 7961, 8380, 8968, 11210, 15922, 16760, 22420, 24721, 31844, 39805, 44840, 49442, 63688, 79610, 98884, 123605, 159220, 197768, 247210, 318440, 469699, 494420, 939398, 988840, 1878796, 2348495, 3757592, 4696990, 9393980, 18787960]

約数ペア:

[(1, 18787960), (2, 9393980), (4, 4696990), (5, 3757592), (8, 2348495), (10, 1878796), (19, 988840), (20, 939398), (38, 494420), (40, 469699), (59, 318440), (76, 247210), (95, 197768), (118, 159220), (152, 123605), (190, 98884), (236, 79610), (295, 63688), (380, 49442), (419, 44840), (472, 39805), (590, 31844), (760, 24721), (838, 22420), (1121, 16760), (1180, 15922), (1676, 11210), (2095, 8968), (2242, 8380), (2360, 7961), (3352, 5605), (4190, 4484)]