21335145

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:182

約数の個数: 64

約数和(自身を含む): 39481344

約数和(自身を除く): 18146199

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 67, 69, 71, 115, 195, 201, 213, 299, 335, 345, 355, 871, 897, 923, 1005, 1065, 1495, 1541, 1633, 2613, 2769, 4355, 4485, 4615, 4623, 4757, 4899, 7705, 8165, 13065, 13845, 14271, 20033, 21229, 23115, 23785, 24495, 60099, 61841, 63687, 71355, 100165, 106145, 109411, 185523, 300495, 309205, 318435, 328233, 547055, 927615, 1422343, 1641165, 4267029, 7111715, 21335145]

約数ペア:

[(1, 21335145), (3, 7111715), (5, 4267029), (13, 1641165), (15, 1422343), (23, 927615), (39, 547055), (65, 328233), (67, 318435), (69, 309205), (71, 300495), (115, 185523), (195, 109411), (201, 106145), (213, 100165), (299, 71355), (335, 63687), (345, 61841), (355, 60099), (871, 24495), (897, 23785), (923, 23115), (1005, 21229), (1065, 20033), (1495, 14271), (1541, 13845), (1633, 13065), (2613, 8165), (2769, 7705), (4355, 4899), (4485, 4757), (4615, 4623)]