81495220

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{1979}}^1$

素因数の和:2088

約数の個数: 48

約数和(自身を含む): 179625600

約数和(自身を除く): 98130380

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 580, 710, 1420, 1979, 2059, 3958, 4118, 7916, 8236, 9895, 10295, 19790, 20590, 39580, 41180, 57391, 114782, 140509, 229564, 281018, 286955, 562036, 573910, 702545, 1147820, 1405090, 2810180, 4074761, 8149522, 16299044, 20373805, 40747610, 81495220]

約数ペア:

[(1, 81495220), (2, 40747610), (4, 20373805), (5, 16299044), (10, 8149522), (20, 4074761), (29, 2810180), (58, 1405090), (71, 1147820), (116, 702545), (142, 573910), (145, 562036), (284, 286955), (290, 281018), (355, 229564), (580, 140509), (710, 114782), (1420, 57391), (1979, 41180), (2059, 39580), (3958, 20590), (4118, 19790), (7916, 10295), (8236, 9895)]