218256920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{779489}}^1$

素因数の和:779507

約数の個数: 32

約数和(自身を含む): 561232800

約数和(自身を除く): 342975880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 779489, 1558978, 3117956, 3897445, 5456423, 6235912, 7794890, 10912846, 15589780, 21825692, 27282115, 31179560, 43651384, 54564230, 109128460, 218256920]

約数ペア:

[(1, 218256920), (2, 109128460), (4, 54564230), (5, 43651384), (7, 31179560), (8, 27282115), (10, 21825692), (14, 15589780), (20, 10912846), (28, 7794890), (35, 6235912), (40, 5456423), (56, 3897445), (70, 3117956), (140, 1558978), (280, 779489)]