18768425

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:162

約数の個数: 48

約数和(自身を含む): 27498240

約数和(自身を除く): 8729815

約数列:

[1, 5, 13, 17, 25, 43, 65, 79, 85, 215, 221, 325, 395, 425, 559, 731, 1027, 1075, 1105, 1343, 1975, 2795, 3397, 3655, 5135, 5525, 6715, 9503, 13975, 16985, 17459, 18275, 25675, 33575, 44161, 47515, 57749, 84925, 87295, 220805, 237575, 288745, 436475, 750737, 1104025, 1443725, 3753685, 18768425]

約数ペア:

[(1, 18768425), (5, 3753685), (13, 1443725), (17, 1104025), (25, 750737), (43, 436475), (65, 288745), (79, 237575), (85, 220805), (215, 87295), (221, 84925), (325, 57749), (395, 47515), (425, 44161), (559, 33575), (731, 25675), (1027, 18275), (1075, 17459), (1105, 16985), (1343, 13975), (1975, 9503), (2795, 6715), (3397, 5525), (3655, 5135)]