18009740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{653}}^1$

素因数の和:866

約数の個数: 48

約数和(自身を含む): 43509312

約数和(自身を除く): 25499572

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 653, 788, 985, 1306, 1379, 1970, 2612, 2758, 3265, 3940, 4571, 5516, 6530, 6895, 9142, 13060, 13790, 18284, 22855, 27580, 45710, 91420, 128641, 257282, 514564, 643205, 900487, 1286410, 1800974, 2572820, 3601948, 4502435, 9004870, 18009740]

約数ペア:

[(1, 18009740), (2, 9004870), (4, 4502435), (5, 3601948), (7, 2572820), (10, 1800974), (14, 1286410), (20, 900487), (28, 643205), (35, 514564), (70, 257282), (140, 128641), (197, 91420), (394, 45710), (653, 27580), (788, 22855), (985, 18284), (1306, 13790), (1379, 13060), (1970, 9142), (2612, 6895), (2758, 6530), (3265, 5516), (3940, 4571)]