21900640

素因数分解:

$2^5\times 5^1\times {\mathrm{136879}}^1$

素因数の和:136894

約数の個数: 24

約数和(自身を含む): 51740640

約数和(自身を除く): 29840000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 136879, 273758, 547516, 684395, 1095032, 1368790, 2190064, 2737580, 4380128, 5475160, 10950320, 21900640]

約数ペア:

[(1, 21900640), (2, 10950320), (4, 5475160), (5, 4380128), (8, 2737580), (10, 2190064), (16, 1368790), (20, 1095032), (32, 684395), (40, 547516), (80, 273758), (160, 136879)]