21219575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{599}}^1$

素因数の和:731

約数の個数: 24

約数和(自身を含む): 28644000

約数和(自身を除く): 7424425

約数列:

[1, 5, 13, 25, 65, 109, 325, 545, 599, 1417, 2725, 2995, 7085, 7787, 14975, 35425, 38935, 65291, 194675, 326455, 848783, 1632275, 4243915, 21219575]

約数ペア:

[(1, 21219575), (5, 4243915), (13, 1632275), (25, 848783), (65, 326455), (109, 194675), (325, 65291), (545, 38935), (599, 35425), (1417, 14975), (2725, 7787), (2995, 7085)]