20661740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4943}}^1$

素因数の和:4982

約数の個数: 48

約数和(自身を含む): 49835520

約数和(自身を除く): 29173780

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4943, 9886, 19772, 24715, 49430, 54373, 93917, 98860, 108746, 187834, 217492, 271865, 375668, 469585, 543730, 939170, 1033087, 1087460, 1878340, 2066174, 4132348, 5165435, 10330870, 20661740]

約数ペア:

[(1, 20661740), (2, 10330870), (4, 5165435), (5, 4132348), (10, 2066174), (11, 1878340), (19, 1087460), (20, 1033087), (22, 939170), (38, 543730), (44, 469585), (55, 375668), (76, 271865), (95, 217492), (110, 187834), (190, 108746), (209, 98860), (220, 93917), (380, 54373), (418, 49430), (836, 24715), (1045, 19772), (2090, 9886), (4180, 4943)]