21495555

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{811}}^1$

素因数の和:872

約数の個数: 48

約数和(自身を含む): 40535040

約数和(自身を除く): 19039485

約数列:

[1, 3, 5, 9, 15, 19, 31, 45, 57, 93, 95, 155, 171, 279, 285, 465, 589, 811, 855, 1395, 1767, 2433, 2945, 4055, 5301, 7299, 8835, 12165, 15409, 25141, 26505, 36495, 46227, 75423, 77045, 125705, 138681, 226269, 231135, 377115, 477679, 693405, 1131345, 1433037, 2388395, 4299111, 7165185, 21495555]

約数ペア:

[(1, 21495555), (3, 7165185), (5, 4299111), (9, 2388395), (15, 1433037), (19, 1131345), (31, 693405), (45, 477679), (57, 377115), (93, 231135), (95, 226269), (155, 138681), (171, 125705), (279, 77045), (285, 75423), (465, 46227), (589, 36495), (811, 26505), (855, 25141), (1395, 15409), (1767, 12165), (2433, 8835), (2945, 7299), (4055, 5301)]