19982690

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3137}}^1$

素因数の和:3171

約数の個数: 48

約数和(自身を含む): 45074232

約数和(自身を除く): 25091542

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 49, 65, 70, 91, 98, 130, 182, 245, 455, 490, 637, 910, 1274, 3137, 3185, 6274, 6370, 15685, 21959, 31370, 40781, 43918, 81562, 109795, 153713, 203905, 219590, 285467, 307426, 407810, 570934, 768565, 1427335, 1537130, 1998269, 2854670, 3996538, 9991345, 19982690]

約数ペア:

[(1, 19982690), (2, 9991345), (5, 3996538), (7, 2854670), (10, 1998269), (13, 1537130), (14, 1427335), (26, 768565), (35, 570934), (49, 407810), (65, 307426), (70, 285467), (91, 219590), (98, 203905), (130, 153713), (182, 109795), (245, 81562), (455, 43918), (490, 40781), (637, 31370), (910, 21959), (1274, 15685), (3137, 6370), (3185, 6274)]