21987805

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{16979}}^1$

素因数の和:17028

約数の個数: 16

約数和(自身を含む): 30971520

約数和(自身を除く): 8983715

約数列:

[1, 5, 7, 35, 37, 185, 259, 1295, 16979, 84895, 118853, 594265, 628223, 3141115, 4397561, 21987805]

約数ペア:

[(1, 21987805), (5, 4397561), (7, 3141115), (35, 628223), (37, 594265), (185, 118853), (259, 84895), (1295, 16979)]