20179995

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:236

約数の個数: 64

約数和(自身を含む): 38223360

約数和(自身を除く): 18043365

約数列:

[1, 3, 5, 11, 15, 19, 33, 41, 55, 57, 95, 123, 157, 165, 205, 209, 285, 451, 471, 615, 627, 779, 785, 1045, 1353, 1727, 2255, 2337, 2355, 2983, 3135, 3895, 5181, 6437, 6765, 8569, 8635, 8949, 11685, 14915, 19311, 25707, 25905, 32185, 32813, 42845, 44745, 70807, 96555, 98439, 122303, 128535, 164065, 212421, 354035, 366909, 492195, 611515, 1062105, 1345333, 1834545, 4035999, 6726665, 20179995]

約数ペア:

[(1, 20179995), (3, 6726665), (5, 4035999), (11, 1834545), (15, 1345333), (19, 1062105), (33, 611515), (41, 492195), (55, 366909), (57, 354035), (95, 212421), (123, 164065), (157, 128535), (165, 122303), (205, 98439), (209, 96555), (285, 70807), (451, 44745), (471, 42845), (615, 32813), (627, 32185), (779, 25905), (785, 25707), (1045, 19311), (1353, 14915), (1727, 11685), (2255, 8949), (2337, 8635), (2355, 8569), (2983, 6765), (3135, 6437), (3895, 5181)]