78418420

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{38821}}^1$

素因数の和:38931

約数の個数: 24

約数和(自身を含む): 166313448

約数和(自身を除く): 87895028

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 38821, 77642, 155284, 194105, 388210, 776420, 3920921, 7841842, 15683684, 19604605, 39209210, 78418420]

約数ペア:

[(1, 78418420), (2, 39209210), (4, 19604605), (5, 15683684), (10, 7841842), (20, 3920921), (101, 776420), (202, 388210), (404, 194105), (505, 155284), (1010, 77642), (2020, 38821)]