991220

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1709}}^1$

素因数の和:1747

約数の個数: 24

約数和(自身を含む): 2154600

約数和(自身を除く): 1163380

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 1709, 3418, 6836, 8545, 17090, 34180, 49561, 99122, 198244, 247805, 495610, 991220]

約数ペア:

[(1, 991220), (2, 495610), (4, 247805), (5, 198244), (10, 99122), (20, 49561), (29, 34180), (58, 17090), (116, 8545), (145, 6836), (290, 3418), (580, 1709)]