20856825

素因数分解:

$3^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{53}}^2$

素因数の和:136

約数の個数: 72

約数和(自身を含む): 42601440

約数和(自身を除く): 21744615

約数列:

[1, 3, 5, 9, 11, 15, 25, 27, 33, 45, 53, 55, 75, 99, 135, 159, 165, 225, 265, 275, 297, 477, 495, 583, 675, 795, 825, 1325, 1431, 1485, 1749, 2385, 2475, 2809, 2915, 3975, 5247, 7155, 7425, 8427, 8745, 11925, 14045, 14575, 15741, 25281, 26235, 30899, 35775, 42135, 43725, 70225, 75843, 78705, 92697, 126405, 131175, 154495, 210675, 278091, 379215, 393525, 463485, 632025, 772475, 834273, 1390455, 1896075, 2317425, 4171365, 6952275, 20856825]

約数ペア:

[(1, 20856825), (3, 6952275), (5, 4171365), (9, 2317425), (11, 1896075), (15, 1390455), (25, 834273), (27, 772475), (33, 632025), (45, 463485), (53, 393525), (55, 379215), (75, 278091), (99, 210675), (135, 154495), (159, 131175), (165, 126405), (225, 92697), (265, 78705), (275, 75843), (297, 70225), (477, 43725), (495, 42135), (583, 35775), (675, 30899), (795, 26235), (825, 25281), (1325, 15741), (1431, 14575), (1485, 14045), (1749, 11925), (2385, 8745), (2475, 8427), (2809, 7425), (2915, 7155), (3975, 5247)]