156718820

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{19541}}^1$

素因数の和:19951

約数の個数: 24

約数和(自身を含む): 329947128

約数和(自身を除く): 173228308

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 4010, 8020, 19541, 39082, 78164, 97705, 195410, 390820, 7835941, 15671882, 31343764, 39179705, 78359410, 156718820]

約数ペア:

[(1, 156718820), (2, 78359410), (4, 39179705), (5, 31343764), (10, 15671882), (20, 7835941), (401, 390820), (802, 195410), (1604, 97705), (2005, 78164), (4010, 39082), (8020, 19541)]