19909515

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{1237}}^1$

素因数の和:1311

約数の個数: 32

約数和(自身を含む): 33871680

約数和(自身を除く): 13962165

約数列:

[1, 3, 5, 15, 29, 37, 87, 111, 145, 185, 435, 555, 1073, 1237, 3219, 3711, 5365, 6185, 16095, 18555, 35873, 45769, 107619, 137307, 179365, 228845, 538095, 686535, 1327301, 3981903, 6636505, 19909515]

約数ペア:

[(1, 19909515), (3, 6636505), (5, 3981903), (15, 1327301), (29, 686535), (37, 538095), (87, 228845), (111, 179365), (145, 137307), (185, 107619), (435, 45769), (555, 35873), (1073, 18555), (1237, 16095), (3219, 6185), (3711, 5365)]