19965785

素因数分解:

$5^1\times 7^2\times {\mathrm{227}}^1\times {\mathrm{359}}^1$

素因数の和:605

約数の個数: 24

約数和(自身を含む): 28071360

約数和(自身を除く): 8105575

約数列:

[1, 5, 7, 35, 49, 227, 245, 359, 1135, 1589, 1795, 2513, 7945, 11123, 12565, 17591, 55615, 81493, 87955, 407465, 570451, 2852255, 3993157, 19965785]

約数ペア:

[(1, 19965785), (5, 3993157), (7, 2852255), (35, 570451), (49, 407465), (227, 87955), (245, 81493), (359, 55615), (1135, 17591), (1589, 12565), (1795, 11123), (2513, 7945)]