20401565

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{3061}}^1$

素因数の和:3140

約数の個数: 16

約数和(自身を含む): 25867776

約数和(自身を除く): 5466211

約数列:

[1, 5, 31, 43, 155, 215, 1333, 3061, 6665, 15305, 94891, 131623, 474455, 658115, 4080313, 20401565]

約数ペア:

[(1, 20401565), (5, 4080313), (31, 658115), (43, 474455), (155, 131623), (215, 94891), (1333, 15305), (3061, 6665)]