21904020

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{4507}}^1$

素因数の和:4531

約数の個数: 72

約数和(自身を含む): 68918304

約数和(自身を除く): 47014284

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 486, 540, 810, 972, 1215, 1620, 2430, 4507, 4860, 9014, 13521, 18028, 22535, 27042, 40563, 45070, 54084, 67605, 81126, 90140, 121689, 135210, 162252, 202815, 243378, 270420, 365067, 405630, 486756, 608445, 730134, 811260, 1095201, 1216890, 1460268, 1825335, 2190402, 2433780, 3650670, 4380804, 5476005, 7301340, 10952010, 21904020]

約数ペア:

[(1, 21904020), (2, 10952010), (3, 7301340), (4, 5476005), (5, 4380804), (6, 3650670), (9, 2433780), (10, 2190402), (12, 1825335), (15, 1460268), (18, 1216890), (20, 1095201), (27, 811260), (30, 730134), (36, 608445), (45, 486756), (54, 405630), (60, 365067), (81, 270420), (90, 243378), (108, 202815), (135, 162252), (162, 135210), (180, 121689), (243, 90140), (270, 81126), (324, 67605), (405, 54084), (486, 45070), (540, 40563), (810, 27042), (972, 22535), (1215, 18028), (1620, 13521), (2430, 9014), (4507, 4860)]