221471649

素因数分解:

$3^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{739}}^1$

素因数の和:890

約数の個数: 48

約数和(自身を含む): 376796160

約数和(自身を除く): 155324511

約数列:

[1, 3, 7, 9, 21, 63, 67, 71, 201, 213, 469, 497, 603, 639, 739, 1407, 1491, 2217, 4221, 4473, 4757, 5173, 6651, 14271, 15519, 33299, 42813, 46557, 49513, 52469, 99897, 148539, 157407, 299691, 346591, 367283, 445617, 472221, 1039773, 1101849, 3119319, 3305547, 3515423, 10546269, 24607961, 31638807, 73823883, 221471649]

約数ペア:

[(1, 221471649), (3, 73823883), (7, 31638807), (9, 24607961), (21, 10546269), (63, 3515423), (67, 3305547), (71, 3119319), (201, 1101849), (213, 1039773), (469, 472221), (497, 445617), (603, 367283), (639, 346591), (739, 299691), (1407, 157407), (1491, 148539), (2217, 99897), (4221, 52469), (4473, 49513), (4757, 46557), (5173, 42813), (6651, 33299), (14271, 15519)]