21063740

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12689}}^1$

素因数の和:12781

約数の個数: 24

約数和(自身を含む): 44770320

約数和(自身を除く): 23706580

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12689, 25378, 50756, 63445, 126890, 253780, 1053187, 2106374, 4212748, 5265935, 10531870, 21063740]

約数ペア:

[(1, 21063740), (2, 10531870), (4, 5265935), (5, 4212748), (10, 2106374), (20, 1053187), (83, 253780), (166, 126890), (332, 63445), (415, 50756), (830, 25378), (1660, 12689)]