28080580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{1171}}^1$

素因数の和:1300

約数の個数: 48

約数和(自身を含む): 64975680

約数和(自身を除く): 36895100

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 109, 110, 218, 220, 436, 545, 1090, 1171, 1199, 2180, 2342, 2398, 4684, 4796, 5855, 5995, 11710, 11990, 12881, 23420, 23980, 25762, 51524, 64405, 127639, 128810, 255278, 257620, 510556, 638195, 1276390, 1404029, 2552780, 2808058, 5616116, 7020145, 14040290, 28080580]

約数ペア:

[(1, 28080580), (2, 14040290), (4, 7020145), (5, 5616116), (10, 2808058), (11, 2552780), (20, 1404029), (22, 1276390), (44, 638195), (55, 510556), (109, 257620), (110, 255278), (218, 128810), (220, 127639), (436, 64405), (545, 51524), (1090, 25762), (1171, 23980), (1199, 23420), (2180, 12881), (2342, 11990), (2398, 11710), (4684, 5995), (4796, 5855)]