399993985

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:565

約数の個数: 32

約数和(自身を含む): 516096000

約数和(自身を除く): 116102015

約数列:

[1, 5, 19, 79, 95, 223, 239, 395, 1115, 1195, 1501, 4237, 4541, 7505, 17617, 18881, 21185, 22705, 53297, 88085, 94405, 266485, 334723, 358739, 1012643, 1673615, 1793695, 4210463, 5063215, 21052315, 79998797, 399993985]

約数ペア:

[(1, 399993985), (5, 79998797), (19, 21052315), (79, 5063215), (95, 4210463), (223, 1793695), (239, 1673615), (395, 1012643), (1115, 358739), (1195, 334723), (1501, 266485), (4237, 94405), (4541, 88085), (7505, 53297), (17617, 22705), (18881, 21185)]