18846640

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2647}}^1$

素因数の和:2749

約数の個数: 40

約数和(自身を含む): 44327520

約数和(自身を除く): 25480880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2647, 3560, 5294, 7120, 10588, 13235, 21176, 26470, 42352, 52940, 105880, 211760, 235583, 471166, 942332, 1177915, 1884664, 2355830, 3769328, 4711660, 9423320, 18846640]

約数ペア:

[(1, 18846640), (2, 9423320), (4, 4711660), (5, 3769328), (8, 2355830), (10, 1884664), (16, 1177915), (20, 942332), (40, 471166), (80, 235583), (89, 211760), (178, 105880), (356, 52940), (445, 42352), (712, 26470), (890, 21176), (1424, 13235), (1780, 10588), (2647, 7120), (3560, 5294)]