21680463

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{811}}^1$

素因数の和:907

約数の個数: 32

約数和(自身を含む): 35338240

約数和(自身を除く): 13657777

約数列:

[1, 3, 7, 19, 21, 57, 67, 133, 201, 399, 469, 811, 1273, 1407, 2433, 3819, 5677, 8911, 15409, 17031, 26733, 46227, 54337, 107863, 163011, 323589, 380359, 1032403, 1141077, 3097209, 7226821, 21680463]

約数ペア:

[(1, 21680463), (3, 7226821), (7, 3097209), (19, 1141077), (21, 1032403), (57, 380359), (67, 323589), (133, 163011), (201, 107863), (399, 54337), (469, 46227), (811, 26733), (1273, 17031), (1407, 15409), (2433, 8911), (3819, 5677)]