21088990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{5233}}^1$

素因数の和:5284

約数の個数: 32

約数和(自身を含む): 42206976

約数和(自身を除く): 21117986

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 5233, 10466, 26165, 52330, 68029, 136058, 162223, 324446, 340145, 680290, 811115, 1622230, 2108899, 4217798, 10544495, 21088990]

約数ペア:

[(1, 21088990), (2, 10544495), (5, 4217798), (10, 2108899), (13, 1622230), (26, 811115), (31, 680290), (62, 340145), (65, 324446), (130, 162223), (155, 136058), (310, 68029), (403, 52330), (806, 26165), (2015, 10466), (4030, 5233)]