18447980

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1439}}^1$

素因数の和:2089

約数の個数: 24

約数和(自身を含む): 38828160

約数和(自身を除く): 20380180

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 1439, 2564, 2878, 3205, 5756, 6410, 7195, 12820, 14390, 28780, 922399, 1844798, 3689596, 4611995, 9223990, 18447980]

約数ペア:

[(1, 18447980), (2, 9223990), (4, 4611995), (5, 3689596), (10, 1844798), (20, 922399), (641, 28780), (1282, 14390), (1439, 12820), (2564, 7195), (2878, 6410), (3205, 5756)]