18257841

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2179}}^1$

素因数の和:2218

約数の個数: 36

約数和(自身を含む): 32307600

約数和(自身を除く): 14049759

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 2179, 2793, 6537, 8379, 15253, 19611, 41401, 45759, 106771, 124203, 137277, 289807, 320313, 372609, 869421, 960939, 2028649, 2608263, 6085947, 18257841]

約数ペア:

[(1, 18257841), (3, 6085947), (7, 2608263), (9, 2028649), (19, 960939), (21, 869421), (49, 372609), (57, 320313), (63, 289807), (133, 137277), (147, 124203), (171, 106771), (399, 45759), (441, 41401), (931, 19611), (1197, 15253), (2179, 8379), (2793, 6537)]