21707420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3299}}^1$

素因数の和:3362

約数の個数: 48

約数和(自身を含む): 53222400

約数和(自身を除く): 31514980

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, 3290, 3299, 6580, 6598, 13196, 16495, 23093, 32990, 46186, 65980, 92372, 115465, 155053, 230930, 310106, 461860, 620212, 775265, 1085371, 1550530, 2170742, 3101060, 4341484, 5426855, 10853710, 21707420]

約数ペア:

[(1, 21707420), (2, 10853710), (4, 5426855), (5, 4341484), (7, 3101060), (10, 2170742), (14, 1550530), (20, 1085371), (28, 775265), (35, 620212), (47, 461860), (70, 310106), (94, 230930), (140, 155053), (188, 115465), (235, 92372), (329, 65980), (470, 46186), (658, 32990), (940, 23093), (1316, 16495), (1645, 13196), (3290, 6598), (3299, 6580)]