1640570020

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{39839}}^1$

素因数の和:39948

約数の個数: 48

約数和(自身を含む): 3614284800

約数和(自身を除く): 1973714780

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 580, 710, 1420, 2059, 4118, 8236, 10295, 20590, 39839, 41180, 79678, 159356, 199195, 398390, 796780, 1155331, 2310662, 2828569, 4621324, 5657138, 5776655, 11314276, 11553310, 14142845, 23106620, 28285690, 56571380, 82028501, 164057002, 328114004, 410142505, 820285010, 1640570020]

約数ペア:

[(1, 1640570020), (2, 820285010), (4, 410142505), (5, 328114004), (10, 164057002), (20, 82028501), (29, 56571380), (58, 28285690), (71, 23106620), (116, 14142845), (142, 11553310), (145, 11314276), (284, 5776655), (290, 5657138), (355, 4621324), (580, 2828569), (710, 2310662), (1420, 1155331), (2059, 796780), (4118, 398390), (8236, 199195), (10295, 159356), (20590, 79678), (39839, 41180)]