820199080

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{230393}}^1$

素因数の和:230493

約数の個数: 32

約数和(自身を含む): 1866191400

約数和(自身を除く): 1045992320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 230393, 460786, 921572, 1151965, 1843144, 2303930, 4607860, 9215720, 20504977, 41009954, 82019908, 102524885, 164039816, 205049770, 410099540, 820199080]

約数ペア:

[(1, 820199080), (2, 410099540), (4, 205049770), (5, 164039816), (8, 102524885), (10, 82019908), (20, 41009954), (40, 20504977), (89, 9215720), (178, 4607860), (356, 2303930), (445, 1843144), (712, 1151965), (890, 921572), (1780, 460786), (3560, 230393)]