20871188

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{7573}}^1$

素因数の和:7643

約数の個数: 24

約数和(自身を含む): 40081608

約数和(自身を除く): 19210420

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 212, 689, 1378, 2756, 7573, 15146, 30292, 98449, 196898, 393796, 401369, 802738, 1605476, 5217797, 10435594, 20871188]

約数ペア:

[(1, 20871188), (2, 10435594), (4, 5217797), (13, 1605476), (26, 802738), (52, 401369), (53, 393796), (106, 196898), (212, 98449), (689, 30292), (1378, 15146), (2756, 7573)]