21984440

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7741}}^1$

素因数の和:7823

約数の個数: 32

約数和(自身を含む): 50168160

約数和(自身を除く): 28183720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7741, 15482, 30964, 38705, 61928, 77410, 154820, 309640, 549611, 1099222, 2198444, 2748055, 4396888, 5496110, 10992220, 21984440]

約数ペア:

[(1, 21984440), (2, 10992220), (4, 5496110), (5, 4396888), (8, 2748055), (10, 2198444), (20, 1099222), (40, 549611), (71, 309640), (142, 154820), (284, 77410), (355, 61928), (568, 38705), (710, 30964), (1420, 15482), (2840, 7741)]