21960560

素因数分解:

$2^4\times 5^1\times {\mathrm{277}}^1\times {\mathrm{991}}^1$

素因数の和:1281

約数の個数: 40

約数和(自身を含む): 51294336

約数和(自身を除く): 29333776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 277, 554, 991, 1108, 1385, 1982, 2216, 2770, 3964, 4432, 4955, 5540, 7928, 9910, 11080, 15856, 19820, 22160, 39640, 79280, 274507, 549014, 1098028, 1372535, 2196056, 2745070, 4392112, 5490140, 10980280, 21960560]

約数ペア:

[(1, 21960560), (2, 10980280), (4, 5490140), (5, 4392112), (8, 2745070), (10, 2196056), (16, 1372535), (20, 1098028), (40, 549014), (80, 274507), (277, 79280), (554, 39640), (991, 22160), (1108, 19820), (1385, 15856), (1982, 11080), (2216, 9910), (2770, 7928), (3964, 5540), (4432, 4955)]