263980

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{197}}^1$

素因数の和:273

約数の個数: 24

約数和(自身を含む): 565488

約数和(自身を除く): 301508

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 197, 268, 335, 394, 670, 788, 985, 1340, 1970, 3940, 13199, 26398, 52796, 65995, 131990, 263980]

約数ペア:

[(1, 263980), (2, 131990), (4, 65995), (5, 52796), (10, 26398), (20, 13199), (67, 3940), (134, 1970), (197, 1340), (268, 985), (335, 788), (394, 670)]