20820579

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{449}}^1$

素因数の和:535

約数の個数: 32

約数和(自身を含む): 31752000

約数和(自身を除く): 10931421

約数列:

[1, 3, 13, 29, 39, 41, 87, 123, 377, 449, 533, 1131, 1189, 1347, 1599, 3567, 5837, 13021, 15457, 17511, 18409, 39063, 46371, 55227, 169273, 239317, 507819, 533861, 717951, 1601583, 6940193, 20820579]

約数ペア:

[(1, 20820579), (3, 6940193), (13, 1601583), (29, 717951), (39, 533861), (41, 507819), (87, 239317), (123, 169273), (377, 55227), (449, 46371), (533, 39063), (1131, 18409), (1189, 17511), (1347, 15457), (1599, 13021), (3567, 5837)]