20999265

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{4651}}^1$

素因数の和:4709

約数の個数: 32

約数和(自身を含む): 39300096

約数和(自身を除く): 18300831

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 105, 129, 215, 301, 645, 903, 1505, 4515, 4651, 13953, 23255, 32557, 69765, 97671, 162785, 199993, 488355, 599979, 999965, 1399951, 2999895, 4199853, 6999755, 20999265]

約数ペア:

[(1, 20999265), (3, 6999755), (5, 4199853), (7, 2999895), (15, 1399951), (21, 999965), (35, 599979), (43, 488355), (105, 199993), (129, 162785), (215, 97671), (301, 69765), (645, 32557), (903, 23255), (1505, 13953), (4515, 4651)]