20013920

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2909}}^1$

素因数の和:2967

約数の個数: 48

約数和(自身を含む): 48399120

約数和(自身を除く): 28385200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 2909, 3440, 5818, 6880, 11636, 14545, 23272, 29090, 46544, 58180, 93088, 116360, 125087, 232720, 250174, 465440, 500348, 625435, 1000696, 1250870, 2001392, 2501740, 4002784, 5003480, 10006960, 20013920]

約数ペア:

[(1, 20013920), (2, 10006960), (4, 5003480), (5, 4002784), (8, 2501740), (10, 2001392), (16, 1250870), (20, 1000696), (32, 625435), (40, 500348), (43, 465440), (80, 250174), (86, 232720), (160, 125087), (172, 116360), (215, 93088), (344, 58180), (430, 46544), (688, 29090), (860, 23272), (1376, 14545), (1720, 11636), (2909, 6880), (3440, 5818)]