20772225

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1$

素因数の和:191

約数の個数: 72

約数和(自身を含む): 40428960

約数和(自身を除く): 19656735

約数列:

[1, 3, 5, 9, 15, 19, 25, 43, 45, 57, 75, 95, 113, 129, 171, 215, 225, 285, 339, 387, 475, 565, 645, 817, 855, 1017, 1075, 1425, 1695, 1935, 2147, 2451, 2825, 3225, 4085, 4275, 4859, 5085, 6441, 7353, 8475, 9675, 10735, 12255, 14577, 19323, 20425, 24295, 25425, 32205, 36765, 43731, 53675, 61275, 72885, 92321, 96615, 121475, 161025, 183825, 218655, 276963, 364425, 461605, 483075, 830889, 1093275, 1384815, 2308025, 4154445, 6924075, 20772225]

約数ペア:

[(1, 20772225), (3, 6924075), (5, 4154445), (9, 2308025), (15, 1384815), (19, 1093275), (25, 830889), (43, 483075), (45, 461605), (57, 364425), (75, 276963), (95, 218655), (113, 183825), (129, 161025), (171, 121475), (215, 96615), (225, 92321), (285, 72885), (339, 61275), (387, 53675), (475, 43731), (565, 36765), (645, 32205), (817, 25425), (855, 24295), (1017, 20425), (1075, 19323), (1425, 14577), (1695, 12255), (1935, 10735), (2147, 9675), (2451, 8475), (2825, 7353), (3225, 6441), (4085, 5085), (4275, 4859)]