20398465

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{1303}}^1$

素因数の和:1440

約数の個数: 16

約数和(自身を含む): 25537536

約数和(自身を除く): 5139071

約数列:

[1, 5, 31, 101, 155, 505, 1303, 3131, 6515, 15655, 40393, 131603, 201965, 658015, 4079693, 20398465]

約数ペア:

[(1, 20398465), (5, 4079693), (31, 658015), (101, 201965), (155, 131603), (505, 40393), (1303, 15655), (3131, 6515)]