20879120

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8419}}^1$

素因数の和:8463

約数の個数: 40

約数和(自身を含む): 50115840

約数和(自身を除く): 29236720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8419, 16838, 33676, 42095, 67352, 84190, 134704, 168380, 260989, 336760, 521978, 673520, 1043956, 1304945, 2087912, 2609890, 4175824, 5219780, 10439560, 20879120]

約数ペア:

[(1, 20879120), (2, 10439560), (4, 5219780), (5, 4175824), (8, 2609890), (10, 2087912), (16, 1304945), (20, 1043956), (31, 673520), (40, 521978), (62, 336760), (80, 260989), (124, 168380), (155, 134704), (248, 84190), (310, 67352), (496, 42095), (620, 33676), (1240, 16838), (2480, 8419)]