18851920

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3319}}^1$

素因数の和:3403

約数の個数: 40

約数和(自身を含む): 44461440

約数和(自身を除く): 25609520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3319, 5680, 6638, 13276, 16595, 26552, 33190, 53104, 66380, 132760, 235649, 265520, 471298, 942596, 1178245, 1885192, 2356490, 3770384, 4712980, 9425960, 18851920]

約数ペア:

[(1, 18851920), (2, 9425960), (4, 4712980), (5, 3770384), (8, 2356490), (10, 1885192), (16, 1178245), (20, 942596), (40, 471298), (71, 265520), (80, 235649), (142, 132760), (284, 66380), (355, 53104), (568, 33190), (710, 26552), (1136, 16595), (1420, 13276), (2840, 6638), (3319, 5680)]