21279950

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{13729}}^1$

素因数の和:13772

約数の個数: 24

約数和(自身を含む): 40860480

約数和(自身を除く): 19580530

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 155, 310, 775, 1550, 13729, 27458, 68645, 137290, 343225, 425599, 686450, 851198, 2127995, 4255990, 10639975, 21279950]

約数ペア:

[(1, 21279950), (2, 10639975), (5, 4255990), (10, 2127995), (25, 851198), (31, 686450), (50, 425599), (62, 343225), (155, 137290), (310, 68645), (775, 27458), (1550, 13729)]