21803265

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2591}}^1$

素因数の和:2630

約数の個数: 48

約数和(自身を含む): 43670016

約数和(自身を除く): 21866751

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 45, 51, 55, 85, 99, 153, 165, 187, 255, 495, 561, 765, 935, 1683, 2591, 2805, 7773, 8415, 12955, 23319, 28501, 38865, 44047, 85503, 116595, 132141, 142505, 220235, 256509, 396423, 427515, 484517, 660705, 1282545, 1453551, 1982115, 2422585, 4360653, 7267755, 21803265]

約数ペア:

[(1, 21803265), (3, 7267755), (5, 4360653), (9, 2422585), (11, 1982115), (15, 1453551), (17, 1282545), (33, 660705), (45, 484517), (51, 427515), (55, 396423), (85, 256509), (99, 220235), (153, 142505), (165, 132141), (187, 116595), (255, 85503), (495, 44047), (561, 38865), (765, 28501), (935, 23319), (1683, 12955), (2591, 8415), (2805, 7773)]