880720

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:223

約数の個数: 40

約数和(自身を含む): 2086920

約数和(自身を除く): 1206200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 109, 202, 218, 404, 436, 505, 545, 808, 872, 1010, 1090, 1616, 1744, 2020, 2180, 4040, 4360, 8080, 8720, 11009, 22018, 44036, 55045, 88072, 110090, 176144, 220180, 440360, 880720]

約数ペア:

[(1, 880720), (2, 440360), (4, 220180), (5, 176144), (8, 110090), (10, 88072), (16, 55045), (20, 44036), (40, 22018), (80, 11009), (101, 8720), (109, 8080), (202, 4360), (218, 4040), (404, 2180), (436, 2020), (505, 1744), (545, 1616), (808, 1090), (872, 1010)]