20802765

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{191}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 34338816

約数和(自身を除く): 13536051

約数列:

[1, 3, 5, 15, 53, 137, 159, 191, 265, 411, 573, 685, 795, 955, 2055, 2865, 7261, 10123, 21783, 26167, 30369, 36305, 50615, 78501, 108915, 130835, 151845, 392505, 1386851, 4160553, 6934255, 20802765]

約数ペア:

[(1, 20802765), (3, 6934255), (5, 4160553), (15, 1386851), (53, 392505), (137, 151845), (159, 130835), (191, 108915), (265, 78501), (411, 50615), (573, 36305), (685, 30369), (795, 26167), (955, 21783), (2055, 10123), (2865, 7261)]