20742640

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1033}}^1$

素因数の和:1297

約数の個数: 40

約数和(自身を含む): 48465648

約数和(自身を除く): 27723008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1033, 1255, 2008, 2066, 2510, 4016, 4132, 5020, 5165, 8264, 10040, 10330, 16528, 20080, 20660, 41320, 82640, 259283, 518566, 1037132, 1296415, 2074264, 2592830, 4148528, 5185660, 10371320, 20742640]

約数ペア:

[(1, 20742640), (2, 10371320), (4, 5185660), (5, 4148528), (8, 2592830), (10, 2074264), (16, 1296415), (20, 1037132), (40, 518566), (80, 259283), (251, 82640), (502, 41320), (1004, 20660), (1033, 20080), (1255, 16528), (2008, 10330), (2066, 10040), (2510, 8264), (4016, 5165), (4132, 5020)]