639778888

素因数分解:

$2^3\times 7^2\times {\mathrm{997}}^1\times {\mathrm{1637}}^1$

素因数の和:2654

約数の個数: 48

約数和(自身を含む): 1397689020

約数和(自身を除く): 757910132

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392, 997, 1637, 1994, 3274, 3988, 6548, 6979, 7976, 11459, 13096, 13958, 22918, 27916, 45836, 48853, 55832, 80213, 91672, 97706, 160426, 195412, 320852, 390824, 641704, 1632089, 3264178, 6528356, 11424623, 13056712, 22849246, 45698492, 79972361, 91396984, 159944722, 319889444, 639778888]

約数ペア:

[(1, 639778888), (2, 319889444), (4, 159944722), (7, 91396984), (8, 79972361), (14, 45698492), (28, 22849246), (49, 13056712), (56, 11424623), (98, 6528356), (196, 3264178), (392, 1632089), (997, 641704), (1637, 390824), (1994, 320852), (3274, 195412), (3988, 160426), (6548, 97706), (6979, 91672), (7976, 80213), (11459, 55832), (13096, 48853), (13958, 45836), (22918, 27916)]