19987395

素因数分解:

$3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 12913725

約数列:

[1, 3, 5, 15, 79, 101, 167, 237, 303, 395, 501, 505, 835, 1185, 1515, 2505, 7979, 13193, 16867, 23937, 39579, 39895, 50601, 65965, 84335, 119685, 197895, 253005, 1332493, 3997479, 6662465, 19987395]

約数ペア:

[(1, 19987395), (3, 6662465), (5, 3997479), (15, 1332493), (79, 253005), (101, 197895), (167, 119685), (237, 84335), (303, 65965), (395, 50601), (501, 39895), (505, 39579), (835, 23937), (1185, 16867), (1515, 13193), (2505, 7979)]