21438260

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10613}}^1$

素因数の和:10723

約数の個数: 24

約数和(自身を含む): 45470376

約数和(自身を除く): 24032116

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10613, 21226, 42452, 53065, 106130, 212260, 1071913, 2143826, 4287652, 5359565, 10719130, 21438260]

約数ペア:

[(1, 21438260), (2, 10719130), (4, 5359565), (5, 4287652), (10, 2143826), (20, 1071913), (101, 212260), (202, 106130), (404, 53065), (505, 42452), (1010, 21226), (2020, 10613)]