20493655

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{617}}^1$

素因数の和:715

約数の個数: 32

約数和(自身を含む): 30731904

約数和(自身を除く): 10238249

約数列:

[1, 5, 7, 13, 35, 65, 73, 91, 365, 455, 511, 617, 949, 2555, 3085, 4319, 4745, 6643, 8021, 21595, 33215, 40105, 45041, 56147, 225205, 280735, 315287, 585533, 1576435, 2927665, 4098731, 20493655]

約数ペア:

[(1, 20493655), (5, 4098731), (7, 2927665), (13, 1576435), (35, 585533), (65, 315287), (73, 280735), (91, 225205), (365, 56147), (455, 45041), (511, 40105), (617, 33215), (949, 21595), (2555, 8021), (3085, 6643), (4319, 4745)]