78931964

素因数分解:

$2^2\times {\mathrm{89}}^1\times {\mathrm{221719}}^1$

素因数の和:221812

約数の個数: 12

約数和(自身を含む): 139683600

約数和(自身を除く): 60751636

約数列:

[1, 2, 4, 89, 178, 356, 221719, 443438, 886876, 19732991, 39465982, 78931964]

約数ペア:

[(1, 78931964), (2, 39465982), (4, 19732991), (89, 886876), (178, 443438), (356, 221719)]