181780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:219

約数の個数: 24

約数和(自身を含む): 390600

約数和(自身を除く): 208820

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 149, 244, 298, 305, 596, 610, 745, 1220, 1490, 2980, 9089, 18178, 36356, 45445, 90890, 181780]

約数ペア:

[(1, 181780), (2, 90890), (4, 45445), (5, 36356), (10, 18178), (20, 9089), (61, 2980), (122, 1490), (149, 1220), (244, 745), (298, 610), (305, 596)]