18978990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{2647}}^1$

素因数の和:2896

約数の個数: 32

約数和(自身を含む): 45757440

約数和(自身を除く): 26778450

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 239, 478, 717, 1195, 1434, 2390, 2647, 3585, 5294, 7170, 7941, 13235, 15882, 26470, 39705, 79410, 632633, 1265266, 1897899, 3163165, 3795798, 6326330, 9489495, 18978990]

約数ペア:

[(1, 18978990), (2, 9489495), (3, 6326330), (5, 3795798), (6, 3163165), (10, 1897899), (15, 1265266), (30, 632633), (239, 79410), (478, 39705), (717, 26470), (1195, 15882), (1434, 13235), (2390, 7941), (2647, 7170), (3585, 5294)]