21167860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3217}}^1$

素因数の和:3280

約数の個数: 48

約数和(自身を含む): 51899904

約数和(自身を除く): 30732044

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3217, 3290, 6434, 6580, 12868, 16085, 22519, 32170, 45038, 64340, 90076, 112595, 151199, 225190, 302398, 450380, 604796, 755995, 1058393, 1511990, 2116786, 3023980, 4233572, 5291965, 10583930, 21167860]

約数ペア:

[(1, 21167860), (2, 10583930), (4, 5291965), (5, 4233572), (7, 3023980), (10, 2116786), (14, 1511990), (20, 1058393), (28, 755995), (35, 604796), (47, 450380), (70, 302398), (94, 225190), (140, 151199), (188, 112595), (235, 90076), (329, 64340), (470, 45038), (658, 32170), (940, 22519), (1316, 16085), (1645, 12868), (3217, 6580), (3290, 6434)]