21217828

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{1931}}^1$

素因数の和:2043

約数の個数: 24

約数和(自身を含む): 38624544

約数和(自身を除く): 17406716

約数列:

[1, 2, 4, 41, 67, 82, 134, 164, 268, 1931, 2747, 3862, 5494, 7724, 10988, 79171, 129377, 158342, 258754, 316684, 517508, 5304457, 10608914, 21217828]

約数ペア:

[(1, 21217828), (2, 10608914), (4, 5304457), (41, 517508), (67, 316684), (82, 258754), (134, 158342), (164, 129377), (268, 79171), (1931, 10988), (2747, 7724), (3862, 5494)]