18715640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1619}}^1$

素因数の和:1664

約数の個数: 48

約数和(自身を含む): 44760600

約数和(自身を除く): 26044960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 289, 340, 578, 680, 1156, 1445, 1619, 2312, 2890, 3238, 5780, 6476, 8095, 11560, 12952, 16190, 27523, 32380, 55046, 64760, 110092, 137615, 220184, 275230, 467891, 550460, 935782, 1100920, 1871564, 2339455, 3743128, 4678910, 9357820, 18715640]

約数ペア:

[(1, 18715640), (2, 9357820), (4, 4678910), (5, 3743128), (8, 2339455), (10, 1871564), (17, 1100920), (20, 935782), (34, 550460), (40, 467891), (68, 275230), (85, 220184), (136, 137615), (170, 110092), (289, 64760), (340, 55046), (578, 32380), (680, 27523), (1156, 16190), (1445, 12952), (1619, 11560), (2312, 8095), (2890, 6476), (3238, 5780)]