21384765

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10111}}^1$

素因数の和:10169

約数の個数: 24

約数和(自身を含む): 37859328

約数和(自身を除く): 16474563

約数列:

[1, 3, 5, 9, 15, 45, 47, 141, 235, 423, 705, 2115, 10111, 30333, 50555, 90999, 151665, 454995, 475217, 1425651, 2376085, 4276953, 7128255, 21384765]

約数ペア:

[(1, 21384765), (3, 7128255), (5, 4276953), (9, 2376085), (15, 1425651), (45, 475217), (47, 454995), (141, 151665), (235, 90999), (423, 50555), (705, 30333), (2115, 10111)]