20782575

素因数分解:

$3^5\times 5^2\times {\mathrm{11}}^1\times {\mathrm{311}}^1$

素因数の和:347

約数の個数: 72

約数和(自身を含む): 42247296

約数和(自身を除く): 21464721

約数列:

[1, 3, 5, 9, 11, 15, 25, 27, 33, 45, 55, 75, 81, 99, 135, 165, 225, 243, 275, 297, 311, 405, 495, 675, 825, 891, 933, 1215, 1485, 1555, 2025, 2475, 2673, 2799, 3421, 4455, 4665, 6075, 7425, 7775, 8397, 10263, 13365, 13995, 17105, 22275, 23325, 25191, 30789, 41985, 51315, 66825, 69975, 75573, 85525, 92367, 125955, 153945, 209925, 256575, 277101, 377865, 461835, 629775, 769725, 831303, 1385505, 1889325, 2309175, 4156515, 6927525, 20782575]

約数ペア:

[(1, 20782575), (3, 6927525), (5, 4156515), (9, 2309175), (11, 1889325), (15, 1385505), (25, 831303), (27, 769725), (33, 629775), (45, 461835), (55, 377865), (75, 277101), (81, 256575), (99, 209925), (135, 153945), (165, 125955), (225, 92367), (243, 85525), (275, 75573), (297, 69975), (311, 66825), (405, 51315), (495, 41985), (675, 30789), (825, 25191), (891, 23325), (933, 22275), (1215, 17105), (1485, 13995), (1555, 13365), (2025, 10263), (2475, 8397), (2673, 7775), (2799, 7425), (3421, 6075), (4455, 4665)]