21537315

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20809}}^1$

素因数の和:20843

約数の個数: 24

約数和(自身を含む): 38956320

約数和(自身を除く): 17419005

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20809, 62427, 104045, 187281, 312135, 478607, 936405, 1435821, 2393035, 4307463, 7179105, 21537315]

約数ペア:

[(1, 21537315), (3, 7179105), (5, 4307463), (9, 2393035), (15, 1435821), (23, 936405), (45, 478607), (69, 312135), (115, 187281), (207, 104045), (345, 62427), (1035, 20809)]