18905887

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1$

素因数の和:160

約数の個数: 48

約数和(自身を含む): 27349056

約数和(自身を除く): 8443169

約数列:

[1, 7, 11, 13, 17, 77, 91, 101, 119, 121, 143, 187, 221, 707, 847, 1001, 1111, 1309, 1313, 1547, 1573, 1717, 2057, 2431, 7777, 9191, 11011, 12019, 12221, 14399, 14443, 17017, 18887, 22321, 26741, 85547, 101101, 132209, 156247, 158873, 187187, 207757, 245531, 1112111, 1454299, 1718717, 2700841, 18905887]

約数ペア:

[(1, 18905887), (7, 2700841), (11, 1718717), (13, 1454299), (17, 1112111), (77, 245531), (91, 207757), (101, 187187), (119, 158873), (121, 156247), (143, 132209), (187, 101101), (221, 85547), (707, 26741), (847, 22321), (1001, 18887), (1111, 17017), (1309, 14443), (1313, 14399), (1547, 12221), (1573, 12019), (1717, 11011), (2057, 9191), (2431, 7777)]