20453420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{811}}^1$

素因数の和:930

約数の個数: 48

約数和(自身を含む): 46790688

約数和(自身を除く): 26337268

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 194, 260, 388, 485, 811, 970, 1261, 1622, 1940, 2522, 3244, 4055, 5044, 6305, 8110, 10543, 12610, 16220, 21086, 25220, 42172, 52715, 78667, 105430, 157334, 210860, 314668, 393335, 786670, 1022671, 1573340, 2045342, 4090684, 5113355, 10226710, 20453420]

約数ペア:

[(1, 20453420), (2, 10226710), (4, 5113355), (5, 4090684), (10, 2045342), (13, 1573340), (20, 1022671), (26, 786670), (52, 393335), (65, 314668), (97, 210860), (130, 157334), (194, 105430), (260, 78667), (388, 52715), (485, 42172), (811, 25220), (970, 21086), (1261, 16220), (1622, 12610), (1940, 10543), (2522, 8110), (3244, 6305), (4055, 5044)]