20018756

素因数分解:

$2^2\times {\mathrm{127}}^1\times {\mathrm{157}}^1\times {\mathrm{251}}^1$

素因数の和:539

約数の個数: 24

約数和(自身を含む): 35675136

約数和(自身を除く): 15656380

約数列:

[1, 2, 4, 127, 157, 251, 254, 314, 502, 508, 628, 1004, 19939, 31877, 39407, 39878, 63754, 78814, 79756, 127508, 157628, 5004689, 10009378, 20018756]

約数ペア:

[(1, 20018756), (2, 10009378), (4, 5004689), (127, 157628), (157, 127508), (251, 79756), (254, 78814), (314, 63754), (502, 39878), (508, 39407), (628, 31877), (1004, 19939)]