20921254

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{7789}}^1$

素因数の和:7887

約数の個数: 16

約数和(自身を含む): 33652800

約数和(自身を除く): 12731546

約数列:

[1, 2, 17, 34, 79, 158, 1343, 2686, 7789, 15578, 132413, 264826, 615331, 1230662, 10460627, 20921254]

約数ペア:

[(1, 20921254), (2, 10460627), (17, 1230662), (34, 615331), (79, 264826), (158, 132413), (1343, 15578), (2686, 7789)]