20337760

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1609}}^1$

素因数の和:1703

約数の個数: 48

約数和(自身を含む): 48686400

約数和(自身を除く): 28348640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1580, 1609, 2528, 3160, 3218, 6320, 6436, 8045, 12640, 12872, 16090, 25744, 32180, 51488, 64360, 127111, 128720, 254222, 257440, 508444, 635555, 1016888, 1271110, 2033776, 2542220, 4067552, 5084440, 10168880, 20337760]

約数ペア:

[(1, 20337760), (2, 10168880), (4, 5084440), (5, 4067552), (8, 2542220), (10, 2033776), (16, 1271110), (20, 1016888), (32, 635555), (40, 508444), (79, 257440), (80, 254222), (158, 128720), (160, 127111), (316, 64360), (395, 51488), (632, 32180), (790, 25744), (1264, 16090), (1580, 12872), (1609, 12640), (2528, 8045), (3160, 6436), (3218, 6320)]