21091005

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1163}}^1$

素因数の和:1218

約数の個数: 48

約数和(自身を含む): 40674816

約数和(自身を除く): 19583811

約数列:

[1, 3, 5, 9, 13, 15, 31, 39, 45, 65, 93, 117, 155, 195, 279, 403, 465, 585, 1163, 1209, 1395, 2015, 3489, 3627, 5815, 6045, 10467, 15119, 17445, 18135, 36053, 45357, 52335, 75595, 108159, 136071, 180265, 226785, 324477, 468689, 540795, 680355, 1406067, 1622385, 2343445, 4218201, 7030335, 21091005]

約数ペア:

[(1, 21091005), (3, 7030335), (5, 4218201), (9, 2343445), (13, 1622385), (15, 1406067), (31, 680355), (39, 540795), (45, 468689), (65, 324477), (93, 226785), (117, 180265), (155, 136071), (195, 108159), (279, 75595), (403, 52335), (465, 45357), (585, 36053), (1163, 18135), (1209, 17445), (1395, 15119), (2015, 10467), (3489, 6045), (3627, 5815)]