80121980

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{129229}}^1$

素因数の和:129269

約数の個数: 24

約数和(自身を含む): 173685120

約数和(自身を除く): 93563140

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 129229, 258458, 516916, 646145, 1292290, 2584580, 4006099, 8012198, 16024396, 20030495, 40060990, 80121980]

約数ペア:

[(1, 80121980), (2, 40060990), (4, 20030495), (5, 16024396), (10, 8012198), (20, 4006099), (31, 2584580), (62, 1292290), (124, 646145), (155, 516916), (310, 258458), (620, 129229)]