21062475

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{311}}^1$

素因数の和:377

約数の個数: 72

約数和(自身を含む): 44259072

約数和(自身を除く): 23196597

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 43, 45, 63, 75, 105, 129, 175, 215, 225, 301, 311, 315, 387, 525, 645, 903, 933, 1075, 1505, 1555, 1575, 1935, 2177, 2709, 2799, 3225, 4515, 4665, 6531, 7525, 7775, 9675, 10885, 13373, 13545, 13995, 19593, 22575, 23325, 32655, 40119, 54425, 66865, 67725, 69975, 93611, 97965, 120357, 163275, 200595, 280833, 334325, 468055, 489825, 601785, 842499, 1002975, 1404165, 2340275, 3008925, 4212495, 7020825, 21062475]

約数ペア:

[(1, 21062475), (3, 7020825), (5, 4212495), (7, 3008925), (9, 2340275), (15, 1404165), (21, 1002975), (25, 842499), (35, 601785), (43, 489825), (45, 468055), (63, 334325), (75, 280833), (105, 200595), (129, 163275), (175, 120357), (215, 97965), (225, 93611), (301, 69975), (311, 67725), (315, 66865), (387, 54425), (525, 40119), (645, 32655), (903, 23325), (933, 22575), (1075, 19593), (1505, 13995), (1555, 13545), (1575, 13373), (1935, 10885), (2177, 9675), (2709, 7775), (2799, 7525), (3225, 6531), (4515, 4665)]