20447955

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{409}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 39143520

約数和(自身を除く): 18695565

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 101, 165, 303, 409, 495, 505, 909, 1111, 1227, 1515, 2045, 3333, 3681, 4499, 4545, 5555, 6135, 9999, 13497, 16665, 18405, 22495, 40491, 41309, 49995, 67485, 123927, 202455, 206545, 371781, 454399, 619635, 1363197, 1858905, 2271995, 4089591, 6815985, 20447955]

約数ペア:

[(1, 20447955), (3, 6815985), (5, 4089591), (9, 2271995), (11, 1858905), (15, 1363197), (33, 619635), (45, 454399), (55, 371781), (99, 206545), (101, 202455), (165, 123927), (303, 67485), (409, 49995), (495, 41309), (505, 40491), (909, 22495), (1111, 18405), (1227, 16665), (1515, 13497), (2045, 9999), (3333, 6135), (3681, 5555), (4499, 4545)]