1901980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1559}}^1$

素因数の和:1629

約数の個数: 24

約数和(自身を含む): 4062240

約数和(自身を除く): 2160260

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 1559, 3118, 6236, 7795, 15590, 31180, 95099, 190198, 380396, 475495, 950990, 1901980]

約数ペア:

[(1, 1901980), (2, 950990), (4, 475495), (5, 380396), (10, 190198), (20, 95099), (61, 31180), (122, 15590), (244, 7795), (305, 6236), (610, 3118), (1220, 1559)]