155515820

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{19391}}^1$

素因数の和:19801

約数の個数: 24

約数和(自身を含む): 327414528

約数和(自身を除く): 171898708

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 4010, 8020, 19391, 38782, 77564, 96955, 193910, 387820, 7775791, 15551582, 31103164, 38878955, 77757910, 155515820]

約数ペア:

[(1, 155515820), (2, 77757910), (4, 38878955), (5, 31103164), (10, 15551582), (20, 7775791), (401, 387820), (802, 193910), (1604, 96955), (2005, 77564), (4010, 38782), (8020, 19391)]