18909207

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 40

約数和(自身を含む): 29707920

約数和(自身を除く): 10798713

約数列:

[1, 3, 9, 27, 43, 61, 81, 89, 129, 183, 267, 387, 549, 801, 1161, 1647, 2403, 2623, 3483, 3827, 4941, 5429, 7209, 7869, 11481, 16287, 23607, 34443, 48861, 70821, 103329, 146583, 212463, 233447, 309987, 439749, 700341, 2101023, 6303069, 18909207]

約数ペア:

[(1, 18909207), (3, 6303069), (9, 2101023), (27, 700341), (43, 439749), (61, 309987), (81, 233447), (89, 212463), (129, 146583), (183, 103329), (267, 70821), (387, 48861), (549, 34443), (801, 23607), (1161, 16287), (1647, 11481), (2403, 7869), (2623, 7209), (3483, 5429), (3827, 4941)]