21981660

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{443}}^1\times {\mathrm{827}}^1$

素因数の和:1282

約数の個数: 48

約数和(自身を含む): 61762176

約数和(自身を除く): 39780516

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 443, 827, 886, 1329, 1654, 1772, 2215, 2481, 2658, 3308, 4135, 4430, 4962, 5316, 6645, 8270, 8860, 9924, 12405, 13290, 16540, 24810, 26580, 49620, 366361, 732722, 1099083, 1465444, 1831805, 2198166, 3663610, 4396332, 5495415, 7327220, 10990830, 21981660]

約数ペア:

[(1, 21981660), (2, 10990830), (3, 7327220), (4, 5495415), (5, 4396332), (6, 3663610), (10, 2198166), (12, 1831805), (15, 1465444), (20, 1099083), (30, 732722), (60, 366361), (443, 49620), (827, 26580), (886, 24810), (1329, 16540), (1654, 13290), (1772, 12405), (2215, 9924), (2481, 8860), (2658, 8270), (3308, 6645), (4135, 5316), (4430, 4962)]