20416840

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4517}}^1$

素因数の和:4641

約数の個数: 32

約数和(自身を含む): 46354680

約数和(自身を除く): 25937840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4517, 4520, 9034, 18068, 22585, 36136, 45170, 90340, 180680, 510421, 1020842, 2041684, 2552105, 4083368, 5104210, 10208420, 20416840]

約数ペア:

[(1, 20416840), (2, 10208420), (4, 5104210), (5, 4083368), (8, 2552105), (10, 2041684), (20, 1020842), (40, 510421), (113, 180680), (226, 90340), (452, 45170), (565, 36136), (904, 22585), (1130, 18068), (2260, 9034), (4517, 4520)]