259780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:459

約数の個数: 24

約数和(自身を含む): 564480

約数和(自身を除く): 304700

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 419, 620, 838, 1676, 2095, 4190, 8380, 12989, 25978, 51956, 64945, 129890, 259780]

約数ペア:

[(1, 259780), (2, 129890), (4, 64945), (5, 51956), (10, 25978), (20, 12989), (31, 8380), (62, 4190), (124, 2095), (155, 1676), (310, 838), (419, 620)]