395000

素因数分解:

$2^3\times 5^4\times {\mathrm{79}}^1$

素因数の和:105

約数の個数: 40

約数和(自身を含む): 937200

約数和(自身を除く): 542200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 79, 100, 125, 158, 200, 250, 316, 395, 500, 625, 632, 790, 1000, 1250, 1580, 1975, 2500, 3160, 3950, 5000, 7900, 9875, 15800, 19750, 39500, 49375, 79000, 98750, 197500, 395000]

約数ペア:

[(1, 395000), (2, 197500), (4, 98750), (5, 79000), (8, 49375), (10, 39500), (20, 19750), (25, 15800), (40, 9875), (50, 7900), (79, 5000), (100, 3950), (125, 3160), (158, 2500), (200, 1975), (250, 1580), (316, 1250), (395, 1000), (500, 790), (625, 632)]