20821245

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1699}}^1$

素因数の和:1769

約数の個数: 32

約数和(自身を含む): 35904000

約数和(自身を除く): 15082755

約数列:

[1, 3, 5, 15, 19, 43, 57, 95, 129, 215, 285, 645, 817, 1699, 2451, 4085, 5097, 8495, 12255, 25485, 32281, 73057, 96843, 161405, 219171, 365285, 484215, 1095855, 1388083, 4164249, 6940415, 20821245]

約数ペア:

[(1, 20821245), (3, 6940415), (5, 4164249), (15, 1388083), (19, 1095855), (43, 484215), (57, 365285), (95, 219171), (129, 161405), (215, 96843), (285, 73057), (645, 32281), (817, 25485), (1699, 12255), (2451, 8495), (4085, 5097)]