18388305

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^2$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 37208808

約数和(自身を除く): 18820503

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 43, 45, 51, 65, 85, 117, 129, 153, 195, 215, 221, 255, 387, 559, 585, 645, 663, 731, 765, 1105, 1677, 1849, 1935, 1989, 2193, 2795, 3315, 3655, 5031, 5547, 6579, 8385, 9245, 9503, 9945, 10965, 16641, 24037, 25155, 27735, 28509, 31433, 32895, 47515, 72111, 83205, 85527, 94299, 120185, 142545, 157165, 216333, 282897, 360555, 408629, 427635, 471495, 1081665, 1225887, 1414485, 2043145, 3677661, 6129435, 18388305]

約数ペア:

[(1, 18388305), (3, 6129435), (5, 3677661), (9, 2043145), (13, 1414485), (15, 1225887), (17, 1081665), (39, 471495), (43, 427635), (45, 408629), (51, 360555), (65, 282897), (85, 216333), (117, 157165), (129, 142545), (153, 120185), (195, 94299), (215, 85527), (221, 83205), (255, 72111), (387, 47515), (559, 32895), (585, 31433), (645, 28509), (663, 27735), (731, 25155), (765, 24037), (1105, 16641), (1677, 10965), (1849, 9945), (1935, 9503), (1989, 9245), (2193, 8385), (2795, 6579), (3315, 5547), (3655, 5031)]