20921140

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10357}}^1$

素因数の和:10467

約数の個数: 24

約数和(自身を含む): 44373672

約数和(自身を除く): 23452532

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10357, 20714, 41428, 51785, 103570, 207140, 1046057, 2092114, 4184228, 5230285, 10460570, 20921140]

約数ペア:

[(1, 20921140), (2, 10460570), (4, 5230285), (5, 4184228), (10, 2092114), (20, 1046057), (101, 207140), (202, 103570), (404, 51785), (505, 41428), (1010, 20714), (2020, 10357)]