18978365

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 27095040

約数和(自身を除く): 8116675

約数列:

[1, 5, 7, 35, 47, 83, 139, 235, 329, 415, 581, 695, 973, 1645, 2905, 3901, 4865, 6533, 11537, 19505, 27307, 32665, 45731, 57685, 80759, 136535, 228655, 403795, 542239, 2711195, 3795673, 18978365]

約数ペア:

[(1, 18978365), (5, 3795673), (7, 2711195), (35, 542239), (47, 403795), (83, 228655), (139, 136535), (235, 80759), (329, 57685), (415, 45731), (581, 32665), (695, 27307), (973, 19505), (1645, 11537), (2905, 6533), (3901, 4865)]