21234015

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:285

約数の個数: 64

約数和(自身を含む): 41932800

約数和(自身を除く): 20698785

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 79, 99, 135, 165, 181, 237, 297, 395, 495, 543, 711, 869, 905, 1185, 1485, 1629, 1991, 2133, 2607, 2715, 3555, 4345, 4887, 5973, 7821, 8145, 9955, 10665, 13035, 14299, 17919, 23463, 24435, 29865, 39105, 42897, 53757, 71495, 89595, 117315, 128691, 157289, 214485, 268785, 386073, 471867, 643455, 786445, 1415601, 1930365, 2359335, 4246803, 7078005, 21234015]

約数ペア:

[(1, 21234015), (3, 7078005), (5, 4246803), (9, 2359335), (11, 1930365), (15, 1415601), (27, 786445), (33, 643455), (45, 471867), (55, 386073), (79, 268785), (99, 214485), (135, 157289), (165, 128691), (181, 117315), (237, 89595), (297, 71495), (395, 53757), (495, 42897), (543, 39105), (711, 29865), (869, 24435), (905, 23463), (1185, 17919), (1485, 14299), (1629, 13035), (1991, 10665), (2133, 9955), (2607, 8145), (2715, 7821), (3555, 5973), (4345, 4887)]