18080720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{389}}^1$

素因数の和:492

約数の個数: 80

約数和(自身を含む): 48746880

約数和(自身を除く): 30666160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 83, 112, 140, 166, 280, 332, 389, 415, 560, 581, 664, 778, 830, 1162, 1328, 1556, 1660, 1945, 2324, 2723, 2905, 3112, 3320, 3890, 4648, 5446, 5810, 6224, 6640, 7780, 9296, 10892, 11620, 13615, 15560, 21784, 23240, 27230, 31120, 32287, 43568, 46480, 54460, 64574, 108920, 129148, 161435, 217840, 226009, 258296, 322870, 452018, 516592, 645740, 904036, 1130045, 1291480, 1808072, 2260090, 2582960, 3616144, 4520180, 9040360, 18080720]

約数ペア:

[(1, 18080720), (2, 9040360), (4, 4520180), (5, 3616144), (7, 2582960), (8, 2260090), (10, 1808072), (14, 1291480), (16, 1130045), (20, 904036), (28, 645740), (35, 516592), (40, 452018), (56, 322870), (70, 258296), (80, 226009), (83, 217840), (112, 161435), (140, 129148), (166, 108920), (280, 64574), (332, 54460), (389, 46480), (415, 43568), (560, 32287), (581, 31120), (664, 27230), (778, 23240), (830, 21784), (1162, 15560), (1328, 13615), (1556, 11620), (1660, 10892), (1945, 9296), (2324, 7780), (2723, 6640), (2905, 6224), (3112, 5810), (3320, 5446), (3890, 4648)]