18985551

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{223}}^1$

素因数の和:335

約数の個数: 32

約数和(自身を含む): 28600320

約数和(自身を除く): 9614769

約数列:

[1, 3, 13, 37, 39, 59, 111, 177, 223, 481, 669, 767, 1443, 2183, 2301, 2899, 6549, 8251, 8697, 13157, 24753, 28379, 39471, 85137, 107263, 171041, 321789, 486809, 513123, 1460427, 6328517, 18985551]

約数ペア:

[(1, 18985551), (3, 6328517), (13, 1460427), (37, 513123), (39, 486809), (59, 321789), (111, 171041), (177, 107263), (223, 85137), (481, 39471), (669, 28379), (767, 24753), (1443, 13157), (2183, 8697), (2301, 8251), (2899, 6549)]