18814760

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{727}}^1$

素因数の和:1385

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 23642200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 727, 1294, 1454, 2588, 2908, 3235, 3635, 5176, 5816, 6470, 7270, 12940, 14540, 25880, 29080, 470369, 940738, 1881476, 2351845, 3762952, 4703690, 9407380, 18814760]

約数ペア:

[(1, 18814760), (2, 9407380), (4, 4703690), (5, 3762952), (8, 2351845), (10, 1881476), (20, 940738), (40, 470369), (647, 29080), (727, 25880), (1294, 14540), (1454, 12940), (2588, 7270), (2908, 6470), (3235, 5816), (3635, 5176)]