20123415

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{839}}^1$

素因数の和:904

約数の個数: 48

約数和(自身を含む): 38525760

約数和(自身を除く): 18402345

約数列:

[1, 3, 5, 9, 13, 15, 39, 41, 45, 65, 117, 123, 195, 205, 369, 533, 585, 615, 839, 1599, 1845, 2517, 2665, 4195, 4797, 7551, 7995, 10907, 12585, 23985, 32721, 34399, 37755, 54535, 98163, 103197, 163605, 171995, 309591, 447187, 490815, 515985, 1341561, 1547955, 2235935, 4024683, 6707805, 20123415]

約数ペア:

[(1, 20123415), (3, 6707805), (5, 4024683), (9, 2235935), (13, 1547955), (15, 1341561), (39, 515985), (41, 490815), (45, 447187), (65, 309591), (117, 171995), (123, 163605), (195, 103197), (205, 98163), (369, 54535), (533, 37755), (585, 34399), (615, 32721), (839, 23985), (1599, 12585), (1845, 10907), (2517, 7995), (2665, 7551), (4195, 4797)]