20981310

素因数分解:

$2^1\times 3^1\times 5^1\times 7^3\times {\mathrm{2039}}^1$

素因数の和:2070

約数の個数: 64

約数和(自身を含む): 58752000

約数和(自身を除く): 37770690

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 49, 70, 98, 105, 147, 210, 245, 294, 343, 490, 686, 735, 1029, 1470, 1715, 2039, 2058, 3430, 4078, 5145, 6117, 10195, 10290, 12234, 14273, 20390, 28546, 30585, 42819, 61170, 71365, 85638, 99911, 142730, 199822, 214095, 299733, 428190, 499555, 599466, 699377, 999110, 1398754, 1498665, 2098131, 2997330, 3496885, 4196262, 6993770, 10490655, 20981310]

約数ペア:

[(1, 20981310), (2, 10490655), (3, 6993770), (5, 4196262), (6, 3496885), (7, 2997330), (10, 2098131), (14, 1498665), (15, 1398754), (21, 999110), (30, 699377), (35, 599466), (42, 499555), (49, 428190), (70, 299733), (98, 214095), (105, 199822), (147, 142730), (210, 99911), (245, 85638), (294, 71365), (343, 61170), (490, 42819), (686, 30585), (735, 28546), (1029, 20390), (1470, 14273), (1715, 12234), (2039, 10290), (2058, 10195), (3430, 6117), (4078, 5145)]