21561920

素因数分解:

$2^6\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1567}}^1$

素因数の和:1627

約数の個数: 56

約数和(自身を含む): 52571904

約数和(自身を除く): 31009984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 160, 172, 215, 320, 344, 430, 688, 860, 1376, 1567, 1720, 2752, 3134, 3440, 6268, 6880, 7835, 12536, 13760, 15670, 25072, 31340, 50144, 62680, 67381, 100288, 125360, 134762, 250720, 269524, 336905, 501440, 539048, 673810, 1078096, 1347620, 2156192, 2695240, 4312384, 5390480, 10780960, 21561920]

約数ペア:

[(1, 21561920), (2, 10780960), (4, 5390480), (5, 4312384), (8, 2695240), (10, 2156192), (16, 1347620), (20, 1078096), (32, 673810), (40, 539048), (43, 501440), (64, 336905), (80, 269524), (86, 250720), (160, 134762), (172, 125360), (215, 100288), (320, 67381), (344, 62680), (430, 50144), (688, 31340), (860, 25072), (1376, 15670), (1567, 13760), (1720, 12536), (2752, 7835), (3134, 6880), (3440, 6268)]