20447750

素因数分解:

$2^1\times 5^3\times {\mathrm{89}}^1\times {\mathrm{919}}^1$

素因数の和:1025

約数の個数: 32

約数和(自身を含む): 38750400

約数和(自身を除く): 18302650

約数列:

[1, 2, 5, 10, 25, 50, 89, 125, 178, 250, 445, 890, 919, 1838, 2225, 4450, 4595, 9190, 11125, 22250, 22975, 45950, 81791, 114875, 163582, 229750, 408955, 817910, 2044775, 4089550, 10223875, 20447750]

約数ペア:

[(1, 20447750), (2, 10223875), (5, 4089550), (10, 2044775), (25, 817910), (50, 408955), (89, 229750), (125, 163582), (178, 114875), (250, 81791), (445, 45950), (890, 22975), (919, 22250), (1838, 11125), (2225, 9190), (4450, 4595)]