20256560

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:246

約数の個数: 80

約数和(自身を含む): 50086080

約数和(自身を除く): 29829520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 101, 109, 115, 184, 202, 218, 230, 368, 404, 436, 460, 505, 545, 808, 872, 920, 1010, 1090, 1616, 1744, 1840, 2020, 2180, 2323, 2507, 4040, 4360, 4646, 5014, 8080, 8720, 9292, 10028, 11009, 11615, 12535, 18584, 20056, 22018, 23230, 25070, 37168, 40112, 44036, 46460, 50140, 55045, 88072, 92920, 100280, 110090, 176144, 185840, 200560, 220180, 253207, 440360, 506414, 880720, 1012828, 1266035, 2025656, 2532070, 4051312, 5064140, 10128280, 20256560]

約数ペア:

[(1, 20256560), (2, 10128280), (4, 5064140), (5, 4051312), (8, 2532070), (10, 2025656), (16, 1266035), (20, 1012828), (23, 880720), (40, 506414), (46, 440360), (80, 253207), (92, 220180), (101, 200560), (109, 185840), (115, 176144), (184, 110090), (202, 100280), (218, 92920), (230, 88072), (368, 55045), (404, 50140), (436, 46460), (460, 44036), (505, 40112), (545, 37168), (808, 25070), (872, 23230), (920, 22018), (1010, 20056), (1090, 18584), (1616, 12535), (1744, 11615), (1840, 11009), (2020, 10028), (2180, 9292), (2323, 8720), (2507, 8080), (4040, 5014), (4360, 4646)]