21130785

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{881}}^1$

素因数の和:946

約数の個数: 48

約数和(自身を含む): 40452048

約数和(自身を除く): 19321263

約数列:

[1, 3, 5, 9, 13, 15, 39, 41, 45, 65, 117, 123, 195, 205, 369, 533, 585, 615, 881, 1599, 1845, 2643, 2665, 4405, 4797, 7929, 7995, 11453, 13215, 23985, 34359, 36121, 39645, 57265, 103077, 108363, 171795, 180605, 325089, 469573, 515385, 541815, 1408719, 1625445, 2347865, 4226157, 7043595, 21130785]

約数ペア:

[(1, 21130785), (3, 7043595), (5, 4226157), (9, 2347865), (13, 1625445), (15, 1408719), (39, 541815), (41, 515385), (45, 469573), (65, 325089), (117, 180605), (123, 171795), (195, 108363), (205, 103077), (369, 57265), (533, 39645), (585, 36121), (615, 34359), (881, 23985), (1599, 13215), (1845, 11453), (2643, 7995), (2665, 7929), (4405, 4797)]