20002040

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4951}}^1$

素因数の和:5063

約数の個数: 32

約数和(自身を含む): 45459360

約数和(自身を除く): 25457320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4951, 9902, 19804, 24755, 39608, 49510, 99020, 198040, 500051, 1000102, 2000204, 2500255, 4000408, 5000510, 10001020, 20002040]

約数ペア:

[(1, 20002040), (2, 10001020), (4, 5000510), (5, 4000408), (8, 2500255), (10, 2000204), (20, 1000102), (40, 500051), (101, 198040), (202, 99020), (404, 49510), (505, 39608), (808, 24755), (1010, 19804), (2020, 9902), (4040, 4951)]