20741080

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12647}}^1$

素因数の和:12699

約数の個数: 32

約数和(自身を含む): 47809440

約数和(自身を除く): 27068360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12647, 25294, 50588, 63235, 101176, 126470, 252940, 505880, 518527, 1037054, 2074108, 2592635, 4148216, 5185270, 10370540, 20741080]

約数ペア:

[(1, 20741080), (2, 10370540), (4, 5185270), (5, 4148216), (8, 2592635), (10, 2074108), (20, 1037054), (40, 518527), (41, 505880), (82, 252940), (164, 126470), (205, 101176), (328, 63235), (410, 50588), (820, 25294), (1640, 12647)]