20996845420

素因数分解:

$2^2\times 5^1\times {\mathrm{1621}}^1\times {\mathrm{647651}}^1$

素因数の和:649281

約数の個数: 24

約数和(自身を含む): 44120644848

約数和(自身を除く): 23123799428

約数列:

[1, 2, 4, 5, 10, 20, 1621, 3242, 6484, 8105, 16210, 32420, 647651, 1295302, 2590604, 3238255, 6476510, 12953020, 1049842271, 2099684542, 4199369084, 5249211355, 10498422710, 20996845420]

約数ペア:

[(1, 20996845420), (2, 10498422710), (4, 5249211355), (5, 4199369084), (10, 2099684542), (20, 1049842271), (1621, 12953020), (3242, 6476510), (6484, 3238255), (8105, 2590604), (16210, 1295302), (32420, 647651)]