19771990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{40351}}^1$

素因数の和:40372

約数の個数: 24

約数和(自身を含む): 41401152

約数和(自身を除く): 21629162

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 40351, 80702, 201755, 282457, 403510, 564914, 1412285, 1977199, 2824570, 3954398, 9885995, 19771990]

約数ペア:

[(1, 19771990), (2, 9885995), (5, 3954398), (7, 2824570), (10, 1977199), (14, 1412285), (35, 564914), (49, 403510), (70, 282457), (98, 201755), (245, 80702), (490, 40351)]