20399015

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{419}}^1$

素因数の和:551

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 10082905

約数列:

[1, 5, 7, 13, 35, 65, 91, 107, 419, 455, 535, 749, 1391, 2095, 2933, 3745, 5447, 6955, 9737, 14665, 27235, 38129, 44833, 48685, 190645, 224165, 313831, 582829, 1569155, 2914145, 4079803, 20399015]

約数ペア:

[(1, 20399015), (5, 4079803), (7, 2914145), (13, 1569155), (35, 582829), (65, 313831), (91, 224165), (107, 190645), (419, 48685), (455, 44833), (535, 38129), (749, 27235), (1391, 14665), (2095, 9737), (2933, 6955), (3745, 5447)]