1639660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 3900960

約数和(自身を除く): 2261300

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 44, 55, 58, 110, 116, 145, 220, 257, 290, 319, 514, 580, 638, 1028, 1276, 1285, 1595, 2570, 2827, 3190, 5140, 5654, 6380, 7453, 11308, 14135, 14906, 28270, 29812, 37265, 56540, 74530, 81983, 149060, 163966, 327932, 409915, 819830, 1639660]

約数ペア:

[(1, 1639660), (2, 819830), (4, 409915), (5, 327932), (10, 163966), (11, 149060), (20, 81983), (22, 74530), (29, 56540), (44, 37265), (55, 29812), (58, 28270), (110, 14906), (116, 14135), (145, 11308), (220, 7453), (257, 6380), (290, 5654), (319, 5140), (514, 3190), (580, 2827), (638, 2570), (1028, 1595), (1276, 1285)]