21903855

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:367

約数の個数: 32

約数和(自身を含む): 36039168

約数和(自身を除く): 14135313

約数列:

[1, 3, 5, 15, 71, 131, 157, 213, 355, 393, 471, 655, 785, 1065, 1965, 2355, 9301, 11147, 20567, 27903, 33441, 46505, 55735, 61701, 102835, 139515, 167205, 308505, 1460257, 4380771, 7301285, 21903855]

約数ペア:

[(1, 21903855), (3, 7301285), (5, 4380771), (15, 1460257), (71, 308505), (131, 167205), (157, 139515), (213, 102835), (355, 61701), (393, 55735), (471, 46505), (655, 33441), (785, 27903), (1065, 20567), (1965, 11147), (2355, 9301)]