21745220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22189}}^1$

素因数の和:22212

約数の個数: 36

約数和(自身を含む): 53122860

約数和(自身を除く): 31377640

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22189, 44378, 88756, 110945, 155323, 221890, 310646, 443780, 621292, 776615, 1087261, 1553230, 2174522, 3106460, 4349044, 5436305, 10872610, 21745220]

約数ペア:

[(1, 21745220), (2, 10872610), (4, 5436305), (5, 4349044), (7, 3106460), (10, 2174522), (14, 1553230), (20, 1087261), (28, 776615), (35, 621292), (49, 443780), (70, 310646), (98, 221890), (140, 155323), (196, 110945), (245, 88756), (490, 44378), (980, 22189)]