21882140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1049}}^1$

素因数の和:1214

約数の個数: 48

約数和(自身を含む): 52920000

約数和(自身を除く): 31037860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 1043, 1049, 1490, 2086, 2098, 2980, 4172, 4196, 5215, 5245, 7343, 10430, 10490, 14686, 20860, 20980, 29372, 36715, 73430, 146860, 156301, 312602, 625204, 781505, 1094107, 1563010, 2188214, 3126020, 4376428, 5470535, 10941070, 21882140]

約数ペア:

[(1, 21882140), (2, 10941070), (4, 5470535), (5, 4376428), (7, 3126020), (10, 2188214), (14, 1563010), (20, 1094107), (28, 781505), (35, 625204), (70, 312602), (140, 156301), (149, 146860), (298, 73430), (596, 36715), (745, 29372), (1043, 20980), (1049, 20860), (1490, 14686), (2086, 10490), (2098, 10430), (2980, 7343), (4172, 5245), (4196, 5215)]