19957805

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 8554195

約数列:

[1, 5, 7, 35, 43, 89, 149, 215, 301, 445, 623, 745, 1043, 1505, 3115, 3827, 5215, 6407, 13261, 19135, 26789, 32035, 44849, 66305, 92827, 133945, 224245, 464135, 570223, 2851115, 3991561, 19957805]

約数ペア:

[(1, 19957805), (5, 3991561), (7, 2851115), (35, 570223), (43, 464135), (89, 224245), (149, 133945), (215, 92827), (301, 66305), (445, 44849), (623, 32035), (745, 26789), (1043, 19135), (1505, 13261), (3115, 6407), (3827, 5215)]