21738760

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2731}}^1$

素因数の和:2941

約数の個数: 32

約数和(自身を含む): 49176000

約数和(自身を除く): 27437240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 2731, 3980, 5462, 7960, 10924, 13655, 21848, 27310, 54620, 109240, 543469, 1086938, 2173876, 2717345, 4347752, 5434690, 10869380, 21738760]

約数ペア:

[(1, 21738760), (2, 10869380), (4, 5434690), (5, 4347752), (8, 2717345), (10, 2173876), (20, 1086938), (40, 543469), (199, 109240), (398, 54620), (796, 27310), (995, 21848), (1592, 13655), (1990, 10924), (2731, 7960), (3980, 5462)]