78778420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{562703}}^1$

素因数の和:562719

約数の個数: 24

約数和(自身を含む): 189068544

約数和(自身を除く): 110290124

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 562703, 1125406, 2250812, 2813515, 3938921, 5627030, 7877842, 11254060, 15755684, 19694605, 39389210, 78778420]

約数ペア:

[(1, 78778420), (2, 39389210), (4, 19694605), (5, 15755684), (7, 11254060), (10, 7877842), (14, 5627030), (20, 3938921), (28, 2813515), (35, 2250812), (70, 1125406), (140, 562703)]