21965860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{156899}}^1$

素因数の和:156915

約数の個数: 24

約数和(自身を含む): 52718400

約数和(自身を除く): 30752540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 156899, 313798, 627596, 784495, 1098293, 1568990, 2196586, 3137980, 4393172, 5491465, 10982930, 21965860]

約数ペア:

[(1, 21965860), (2, 10982930), (4, 5491465), (5, 4393172), (7, 3137980), (10, 2196586), (14, 1568990), (20, 1098293), (28, 784495), (35, 627596), (70, 313798), (140, 156899)]