21399990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{359}}^1\times {\mathrm{1987}}^1$

素因数の和:2356

約数の個数: 32

約数和(自身を含む): 51528960

約数和(自身を除く): 30128970

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 359, 718, 1077, 1795, 1987, 2154, 3590, 3974, 5385, 5961, 9935, 10770, 11922, 19870, 29805, 59610, 713333, 1426666, 2139999, 3566665, 4279998, 7133330, 10699995, 21399990]

約数ペア:

[(1, 21399990), (2, 10699995), (3, 7133330), (5, 4279998), (6, 3566665), (10, 2139999), (15, 1426666), (30, 713333), (359, 59610), (718, 29805), (1077, 19870), (1795, 11922), (1987, 10770), (2154, 9935), (3590, 5961), (3974, 5385)]