21517785

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8389}}^1$

素因数の和:8422

約数の個数: 32

約数和(自身を含む): 40272000

約数和(自身を除く): 18754215

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 8389, 25167, 41945, 75501, 125835, 159391, 226503, 377505, 478173, 796955, 1132515, 1434519, 2390865, 4303557, 7172595, 21517785]

約数ペア:

[(1, 21517785), (3, 7172595), (5, 4303557), (9, 2390865), (15, 1434519), (19, 1132515), (27, 796955), (45, 478173), (57, 377505), (95, 226503), (135, 159391), (171, 125835), (285, 75501), (513, 41945), (855, 25167), (2565, 8389)]