20781160

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16759}}^1$

素因数の和:16801

約数の個数: 32

約数和(自身を含む): 48268800

約数和(自身を除く): 27487640

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16759, 33518, 67036, 83795, 134072, 167590, 335180, 519529, 670360, 1039058, 2078116, 2597645, 4156232, 5195290, 10390580, 20781160]

約数ペア:

[(1, 20781160), (2, 10390580), (4, 5195290), (5, 4156232), (8, 2597645), (10, 2078116), (20, 1039058), (31, 670360), (40, 519529), (62, 335180), (124, 167590), (155, 134072), (248, 83795), (310, 67036), (620, 33518), (1240, 16759)]