18853880

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7727}}^1$

素因数の和:7799

約数の個数: 32

約数和(自身を含む): 43122240

約数和(自身を除く): 24268360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7727, 15454, 30908, 38635, 61816, 77270, 154540, 309080, 471347, 942694, 1885388, 2356735, 3770776, 4713470, 9426940, 18853880]

約数ペア:

[(1, 18853880), (2, 9426940), (4, 4713470), (5, 3770776), (8, 2356735), (10, 1885388), (20, 942694), (40, 471347), (61, 309080), (122, 154540), (244, 77270), (305, 61816), (488, 38635), (610, 30908), (1220, 15454), (2440, 7727)]