128935720

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{13487}}^1$

素因数の和:13737

約数の個数: 32

約数和(自身を含む): 291340800

約数和(自身を除く): 162405080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 2390, 4780, 9560, 13487, 26974, 53948, 67435, 107896, 134870, 269740, 539480, 3223393, 6446786, 12893572, 16116965, 25787144, 32233930, 64467860, 128935720]

約数ペア:

[(1, 128935720), (2, 64467860), (4, 32233930), (5, 25787144), (8, 16116965), (10, 12893572), (20, 6446786), (40, 3223393), (239, 539480), (478, 269740), (956, 134870), (1195, 107896), (1912, 67435), (2390, 53948), (4780, 26974), (9560, 13487)]