261950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1$

素因数の和:69

約数の個数: 36

約数和(自身を含む): 544608

約数和(自身を除く): 282658

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 62, 65, 130, 155, 169, 310, 325, 338, 403, 650, 775, 806, 845, 1550, 1690, 2015, 4030, 4225, 5239, 8450, 10075, 10478, 20150, 26195, 52390, 130975, 261950]

約数ペア:

[(1, 261950), (2, 130975), (5, 52390), (10, 26195), (13, 20150), (25, 10478), (26, 10075), (31, 8450), (50, 5239), (62, 4225), (65, 4030), (130, 2015), (155, 1690), (169, 1550), (310, 845), (325, 806), (338, 775), (403, 650)]