17891980

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{6829}}^1$

素因数の和:6969

約数の個数: 24

約数和(自身を含む): 37865520

約数和(自身を除く): 19973540

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 6829, 13658, 27316, 34145, 68290, 136580, 894599, 1789198, 3578396, 4472995, 8945990, 17891980]

約数ペア:

[(1, 17891980), (2, 8945990), (4, 4472995), (5, 3578396), (10, 1789198), (20, 894599), (131, 136580), (262, 68290), (524, 34145), (655, 27316), (1310, 13658), (2620, 6829)]