31501220

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{4049}}^1$

素因数の和:4447

約数の個数: 24

約数和(自身を含む): 66339000

約数和(自身を除く): 34837780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 4049, 7780, 8098, 16196, 20245, 40490, 80980, 1575061, 3150122, 6300244, 7875305, 15750610, 31501220]

約数ペア:

[(1, 31501220), (2, 15750610), (4, 7875305), (5, 6300244), (10, 3150122), (20, 1575061), (389, 80980), (778, 40490), (1556, 20245), (1945, 16196), (3890, 8098), (4049, 7780)]