21567945

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{569}}^1$

素因数の和:622

約数の個数: 48

約数和(自身を含む): 41696640

約数和(自身を除く): 20128695

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 361, 399, 569, 665, 1083, 1707, 1805, 1995, 2527, 2845, 3983, 5415, 7581, 8535, 10811, 11949, 12635, 19915, 32433, 37905, 54055, 59745, 75677, 162165, 205409, 227031, 378385, 616227, 1027045, 1135155, 1437863, 3081135, 4313589, 7189315, 21567945]

約数ペア:

[(1, 21567945), (3, 7189315), (5, 4313589), (7, 3081135), (15, 1437863), (19, 1135155), (21, 1027045), (35, 616227), (57, 378385), (95, 227031), (105, 205409), (133, 162165), (285, 75677), (361, 59745), (399, 54055), (569, 37905), (665, 32433), (1083, 19915), (1707, 12635), (1805, 11949), (1995, 10811), (2527, 8535), (2845, 7581), (3983, 5415)]