21654020

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{3271}}^1$

素因数の和:3611

約数の個数: 24

約数和(自身を含む): 45624768

約数和(自身を除く): 23970748

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 3271, 3310, 6542, 6620, 13084, 16355, 32710, 65420, 1082701, 2165402, 4330804, 5413505, 10827010, 21654020]

約数ペア:

[(1, 21654020), (2, 10827010), (4, 5413505), (5, 4330804), (10, 2165402), (20, 1082701), (331, 65420), (662, 32710), (1324, 16355), (1655, 13084), (3271, 6620), (3310, 6542)]