21542920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1637}}^1$

素因数の和:1702

約数の個数: 64

約数和(自身を含む): 56609280

約数和(自身を除く): 35066360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 47, 56, 70, 94, 140, 188, 235, 280, 329, 376, 470, 658, 940, 1316, 1637, 1645, 1880, 2632, 3274, 3290, 6548, 6580, 8185, 11459, 13096, 13160, 16370, 22918, 32740, 45836, 57295, 65480, 76939, 91672, 114590, 153878, 229180, 307756, 384695, 458360, 538573, 615512, 769390, 1077146, 1538780, 2154292, 2692865, 3077560, 4308584, 5385730, 10771460, 21542920]

約数ペア:

[(1, 21542920), (2, 10771460), (4, 5385730), (5, 4308584), (7, 3077560), (8, 2692865), (10, 2154292), (14, 1538780), (20, 1077146), (28, 769390), (35, 615512), (40, 538573), (47, 458360), (56, 384695), (70, 307756), (94, 229180), (140, 153878), (188, 114590), (235, 91672), (280, 76939), (329, 65480), (376, 57295), (470, 45836), (658, 32740), (940, 22918), (1316, 16370), (1637, 13160), (1645, 13096), (1880, 11459), (2632, 8185), (3274, 6580), (3290, 6548)]