12721480

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{7757}}^1$

素因数の和:7809

約数の個数: 32

約数和(自身を含む): 29325240

約数和(自身を除く): 16603760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 7757, 15514, 31028, 38785, 62056, 77570, 155140, 310280, 318037, 636074, 1272148, 1590185, 2544296, 3180370, 6360740, 12721480]

約数ペア:

[(1, 12721480), (2, 6360740), (4, 3180370), (5, 2544296), (8, 1590185), (10, 1272148), (20, 636074), (40, 318037), (41, 310280), (82, 155140), (164, 77570), (205, 62056), (328, 38785), (410, 31028), (820, 15514), (1640, 7757)]