19995040

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9613}}^1$

素因数の和:9641

約数の個数: 48

約数和(自身を含む): 50877288

約数和(自身を除く): 30882248

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9613, 19226, 38452, 48065, 76904, 96130, 124969, 153808, 192260, 249938, 307616, 384520, 499876, 624845, 769040, 999752, 1249690, 1538080, 1999504, 2499380, 3999008, 4998760, 9997520, 19995040]

約数ペア:

[(1, 19995040), (2, 9997520), (4, 4998760), (5, 3999008), (8, 2499380), (10, 1999504), (13, 1538080), (16, 1249690), (20, 999752), (26, 769040), (32, 624845), (40, 499876), (52, 384520), (65, 307616), (80, 249938), (104, 192260), (130, 153808), (160, 124969), (208, 96130), (260, 76904), (416, 48065), (520, 38452), (1040, 19226), (2080, 9613)]