78839660

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{40639}}^1$

素因数の和:40745

約数の個数: 24

約数和(自身を含む): 167274240

約数和(自身を除く): 88434580

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 40639, 81278, 162556, 203195, 406390, 812780, 3941983, 7883966, 15767932, 19709915, 39419830, 78839660]

約数ペア:

[(1, 78839660), (2, 39419830), (4, 19709915), (5, 15767932), (10, 7883966), (20, 3941983), (97, 812780), (194, 406390), (388, 203195), (485, 162556), (970, 81278), (1940, 40639)]