20961748

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{18133}}^1$

素因数の和:18171

約数の個数: 18

約数和(自身を含む): 38969966

約数和(自身を除く): 18008218

約数列:

[1, 2, 4, 17, 34, 68, 289, 578, 1156, 18133, 36266, 72532, 308261, 616522, 1233044, 5240437, 10480874, 20961748]

約数ペア:

[(1, 20961748), (2, 10480874), (4, 5240437), (17, 1233044), (34, 616522), (68, 308261), (289, 72532), (578, 36266), (1156, 18133)]