21995540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{8269}}^1$

素因数の和:8304

約数の個数: 48

約数和(自身を含む): 55574400

約数和(自身を除く): 33578860

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 8269, 16538, 33076, 41345, 57883, 82690, 115766, 157111, 165380, 231532, 289415, 314222, 578830, 628444, 785555, 1099777, 1157660, 1571110, 2199554, 3142220, 4399108, 5498885, 10997770, 21995540]

約数ペア:

[(1, 21995540), (2, 10997770), (4, 5498885), (5, 4399108), (7, 3142220), (10, 2199554), (14, 1571110), (19, 1157660), (20, 1099777), (28, 785555), (35, 628444), (38, 578830), (70, 314222), (76, 289415), (95, 231532), (133, 165380), (140, 157111), (190, 115766), (266, 82690), (380, 57883), (532, 41345), (665, 33076), (1330, 16538), (2660, 8269)]