21729785

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{733}}^1$

素因数の和:774

約数の個数: 36

約数和(自身を含む): 33386724

約数和(自身を除く): 11656939

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 121, 245, 385, 539, 605, 733, 847, 2695, 3665, 4235, 5131, 5929, 8063, 25655, 29645, 35917, 40315, 56441, 88693, 179585, 282205, 395087, 443465, 620851, 1975435, 3104255, 4345957, 21729785]

約数ペア:

[(1, 21729785), (5, 4345957), (7, 3104255), (11, 1975435), (35, 620851), (49, 443465), (55, 395087), (77, 282205), (121, 179585), (245, 88693), (385, 56441), (539, 40315), (605, 35917), (733, 29645), (847, 25655), (2695, 8063), (3665, 5929), (4235, 5131)]