15720915

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{293}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 29762208

約数和(自身を除く): 14041293

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 73, 105, 147, 219, 245, 293, 365, 511, 735, 879, 1095, 1465, 1533, 2051, 2555, 3577, 4395, 6153, 7665, 10255, 10731, 14357, 17885, 21389, 30765, 43071, 53655, 64167, 71785, 106945, 149723, 215355, 320835, 449169, 748615, 1048061, 2245845, 3144183, 5240305, 15720915]

約数ペア:

[(1, 15720915), (3, 5240305), (5, 3144183), (7, 2245845), (15, 1048061), (21, 748615), (35, 449169), (49, 320835), (73, 215355), (105, 149723), (147, 106945), (219, 71785), (245, 64167), (293, 53655), (365, 43071), (511, 30765), (735, 21389), (879, 17885), (1095, 14357), (1465, 10731), (1533, 10255), (2051, 7665), (2555, 6153), (3577, 4395)]