21405015

素因数分解:

$3^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1163}}^1$

素因数の和:1583

約数の個数: 24

約数和(自身を含む): 37224720

約数和(自身を除く): 15819705

約数列:

[1, 3, 5, 9, 15, 45, 409, 1163, 1227, 2045, 3489, 3681, 5815, 6135, 10467, 17445, 18405, 52335, 475667, 1427001, 2378335, 4281003, 7135005, 21405015]

約数ペア:

[(1, 21405015), (3, 7135005), (5, 4281003), (9, 2378335), (15, 1427001), (45, 475667), (409, 52335), (1163, 18405), (1227, 17445), (2045, 10467), (3489, 6135), (3681, 5815)]