20021645

素因数分解:

$5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1151}}^1$

素因数の和:1241

約数の個数: 24

約数和(自身を含む): 28366848

約数和(自身を除く): 8345203

約数列:

[1, 5, 7, 35, 49, 71, 245, 355, 497, 1151, 2485, 3479, 5755, 8057, 17395, 40285, 56399, 81721, 281995, 408605, 572047, 2860235, 4004329, 20021645]

約数ペア:

[(1, 20021645), (5, 4004329), (7, 2860235), (35, 572047), (49, 408605), (71, 281995), (245, 81721), (355, 56399), (497, 40285), (1151, 17395), (2485, 8057), (3479, 5755)]