20911660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{367}}^1$

素因数の和:431

約数の個数: 96

約数和(自身を含む): 56383488

約数和(自身を除く): 35471828

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 37, 44, 55, 70, 74, 77, 110, 140, 148, 154, 185, 220, 259, 308, 367, 370, 385, 407, 518, 734, 740, 770, 814, 1036, 1295, 1468, 1540, 1628, 1835, 2035, 2569, 2590, 2849, 3670, 4037, 4070, 5138, 5180, 5698, 7340, 8074, 8140, 10276, 11396, 12845, 13579, 14245, 16148, 20185, 25690, 27158, 28259, 28490, 40370, 51380, 54316, 56518, 56980, 67895, 80740, 95053, 113036, 135790, 141295, 149369, 190106, 271580, 282590, 298738, 380212, 475265, 565180, 597476, 746845, 950530, 1045583, 1493690, 1901060, 2091166, 2987380, 4182332, 5227915, 10455830, 20911660]

約数ペア:

[(1, 20911660), (2, 10455830), (4, 5227915), (5, 4182332), (7, 2987380), (10, 2091166), (11, 1901060), (14, 1493690), (20, 1045583), (22, 950530), (28, 746845), (35, 597476), (37, 565180), (44, 475265), (55, 380212), (70, 298738), (74, 282590), (77, 271580), (110, 190106), (140, 149369), (148, 141295), (154, 135790), (185, 113036), (220, 95053), (259, 80740), (308, 67895), (367, 56980), (370, 56518), (385, 54316), (407, 51380), (518, 40370), (734, 28490), (740, 28259), (770, 27158), (814, 25690), (1036, 20185), (1295, 16148), (1468, 14245), (1540, 13579), (1628, 12845), (1835, 11396), (2035, 10276), (2569, 8140), (2590, 8074), (2849, 7340), (3670, 5698), (4037, 5180), (4070, 5138)]