639563456

素因数分解:

$2^6\times 7^1\times {\mathrm{71}}^1\times {\mathrm{20107}}^1$

素因数の和:20197

約数の個数: 56

約数和(自身を含む): 1470940416

約数和(自身を除く): 831376960

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 71, 112, 142, 224, 284, 448, 497, 568, 994, 1136, 1988, 2272, 3976, 4544, 7952, 15904, 20107, 31808, 40214, 80428, 140749, 160856, 281498, 321712, 562996, 643424, 1125992, 1286848, 1427597, 2251984, 2855194, 4503968, 5710388, 9007936, 9993179, 11420776, 19986358, 22841552, 39972716, 45683104, 79945432, 91366208, 159890864, 319781728, 639563456]

約数ペア:

[(1, 639563456), (2, 319781728), (4, 159890864), (7, 91366208), (8, 79945432), (14, 45683104), (16, 39972716), (28, 22841552), (32, 19986358), (56, 11420776), (64, 9993179), (71, 9007936), (112, 5710388), (142, 4503968), (224, 2855194), (284, 2251984), (448, 1427597), (497, 1286848), (568, 1125992), (994, 643424), (1136, 562996), (1988, 321712), (2272, 281498), (3976, 160856), (4544, 140749), (7952, 80428), (15904, 40214), (20107, 31808)]