20121255

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{5807}}^1$

素因数の和:5836

約数の個数: 48

約数和(自身を含む): 43490304

約数和(自身を除く): 23369049

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 45, 55, 63, 77, 99, 105, 165, 231, 315, 385, 495, 693, 1155, 3465, 5807, 17421, 29035, 40649, 52263, 63877, 87105, 121947, 191631, 203245, 261315, 319385, 365841, 447139, 574893, 609735, 958155, 1341417, 1829205, 2235695, 2874465, 4024251, 6707085, 20121255]

約数ペア:

[(1, 20121255), (3, 6707085), (5, 4024251), (7, 2874465), (9, 2235695), (11, 1829205), (15, 1341417), (21, 958155), (33, 609735), (35, 574893), (45, 447139), (55, 365841), (63, 319385), (77, 261315), (99, 203245), (105, 191631), (165, 121947), (231, 87105), (315, 63877), (385, 52263), (495, 40649), (693, 29035), (1155, 17421), (3465, 5807)]