21139875

素因数分解:

$3^2\times 5^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:106

約数の個数: 96

約数和(自身を含む): 42831360

約数和(自身を除く): 21691485

約数列:

[1, 3, 5, 9, 15, 19, 23, 25, 43, 45, 57, 69, 75, 95, 115, 125, 129, 171, 207, 215, 225, 285, 345, 375, 387, 437, 475, 575, 645, 817, 855, 989, 1035, 1075, 1125, 1311, 1425, 1725, 1935, 2185, 2375, 2451, 2875, 2967, 3225, 3933, 4085, 4275, 4945, 5175, 5375, 6555, 7125, 7353, 8625, 8901, 9675, 10925, 12255, 14835, 16125, 18791, 19665, 20425, 21375, 24725, 25875, 32775, 36765, 44505, 48375, 54625, 56373, 61275, 74175, 93955, 98325, 102125, 123625, 163875, 169119, 183825, 222525, 281865, 306375, 370875, 469775, 491625, 845595, 919125, 1112625, 1409325, 2348875, 4227975, 7046625, 21139875]

約数ペア:

[(1, 21139875), (3, 7046625), (5, 4227975), (9, 2348875), (15, 1409325), (19, 1112625), (23, 919125), (25, 845595), (43, 491625), (45, 469775), (57, 370875), (69, 306375), (75, 281865), (95, 222525), (115, 183825), (125, 169119), (129, 163875), (171, 123625), (207, 102125), (215, 98325), (225, 93955), (285, 74175), (345, 61275), (375, 56373), (387, 54625), (437, 48375), (475, 44505), (575, 36765), (645, 32775), (817, 25875), (855, 24725), (989, 21375), (1035, 20425), (1075, 19665), (1125, 18791), (1311, 16125), (1425, 14835), (1725, 12255), (1935, 10925), (2185, 9675), (2375, 8901), (2451, 8625), (2875, 7353), (2967, 7125), (3225, 6555), (3933, 5375), (4085, 5175), (4275, 4945)]