21043125

素因数分解:

$3^3\times 5^4\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:101

約数の個数: 80

約数和(自身を含む): 41236800

約数和(自身を除く): 20193675

約数列:

[1, 3, 5, 9, 15, 25, 27, 29, 43, 45, 75, 87, 125, 129, 135, 145, 215, 225, 261, 375, 387, 435, 625, 645, 675, 725, 783, 1075, 1125, 1161, 1247, 1305, 1875, 1935, 2175, 3225, 3375, 3625, 3741, 3915, 5375, 5625, 5805, 6235, 6525, 9675, 10875, 11223, 16125, 16875, 18125, 18705, 19575, 26875, 29025, 31175, 32625, 33669, 48375, 54375, 56115, 80625, 93525, 97875, 145125, 155875, 163125, 168345, 241875, 280575, 467625, 489375, 725625, 779375, 841725, 1402875, 2338125, 4208625, 7014375, 21043125]

約数ペア:

[(1, 21043125), (3, 7014375), (5, 4208625), (9, 2338125), (15, 1402875), (25, 841725), (27, 779375), (29, 725625), (43, 489375), (45, 467625), (75, 280575), (87, 241875), (125, 168345), (129, 163125), (135, 155875), (145, 145125), (215, 97875), (225, 93525), (261, 80625), (375, 56115), (387, 54375), (435, 48375), (625, 33669), (645, 32625), (675, 31175), (725, 29025), (783, 26875), (1075, 19575), (1125, 18705), (1161, 18125), (1247, 16875), (1305, 16125), (1875, 11223), (1935, 10875), (2175, 9675), (3225, 6525), (3375, 6235), (3625, 5805), (3741, 5625), (3915, 5375)]