156881980

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{193}}^1\times {\mathrm{419}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 335371680

約数和(自身を除く): 178489700

約数列:

[1, 2, 4, 5, 10, 20, 97, 193, 194, 386, 388, 419, 485, 772, 838, 965, 970, 1676, 1930, 1940, 2095, 3860, 4190, 8380, 18721, 37442, 40643, 74884, 80867, 81286, 93605, 161734, 162572, 187210, 203215, 323468, 374420, 404335, 406430, 808670, 812860, 1617340, 7844099, 15688198, 31376396, 39220495, 78440990, 156881980]

約数ペア:

[(1, 156881980), (2, 78440990), (4, 39220495), (5, 31376396), (10, 15688198), (20, 7844099), (97, 1617340), (193, 812860), (194, 808670), (386, 406430), (388, 404335), (419, 374420), (485, 323468), (772, 203215), (838, 187210), (965, 162572), (970, 161734), (1676, 93605), (1930, 81286), (1940, 80867), (2095, 74884), (3860, 40643), (4190, 37442), (8380, 18721)]