21206511

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{2621}}^1$

素因数の和:2687

約数の個数: 24

約数和(自身を含む): 32722560

約数和(自身を除く): 11516049

約数列:

[1, 3, 9, 29, 31, 87, 93, 261, 279, 899, 2621, 2697, 7863, 8091, 23589, 76009, 81251, 228027, 243753, 684081, 731259, 2356279, 7068837, 21206511]

約数ペア:

[(1, 21206511), (3, 7068837), (9, 2356279), (29, 731259), (31, 684081), (87, 243753), (93, 228027), (261, 81251), (279, 76009), (899, 23589), (2621, 8091), (2697, 7863)]