20991128

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{173}}^1\times {\mathrm{523}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 41029200

約数和(自身を除く): 20038072

約数列:

[1, 2, 4, 8, 29, 58, 116, 173, 232, 346, 523, 692, 1046, 1384, 2092, 4184, 5017, 10034, 15167, 20068, 30334, 40136, 60668, 90479, 121336, 180958, 361916, 723832, 2623891, 5247782, 10495564, 20991128]

約数ペア:

[(1, 20991128), (2, 10495564), (4, 5247782), (8, 2623891), (29, 723832), (58, 361916), (116, 180958), (173, 121336), (232, 90479), (346, 60668), (523, 40136), (692, 30334), (1046, 20068), (1384, 15167), (2092, 10034), (4184, 5017)]