20428973572

素因数分解:

$2^2\times 7^2\times {\mathrm{193}}^1\times {\mathrm{509}}^1\times {\mathrm{1061}}^1$

素因数の和:1781

約数の個数: 72

約数和(自身を含む): 41924637720

約数和(自身を除く): 21495664148

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 193, 196, 386, 509, 772, 1018, 1061, 1351, 2036, 2122, 2702, 3563, 4244, 5404, 7126, 7427, 9457, 14252, 14854, 18914, 24941, 29708, 37828, 49882, 51989, 98237, 99764, 103978, 196474, 204773, 207956, 392948, 409546, 540049, 687659, 819092, 1080098, 1375318, 1433411, 2160196, 2750636, 2866822, 3780343, 4813613, 5733644, 7560686, 9627226, 10033877, 15121372, 19254452, 20067754, 26462401, 40135508, 52924802, 104229457, 105849604, 208458914, 416917828, 729606199, 1459212398, 2918424796, 5107243393, 10214486786, 20428973572]

約数ペア:

[(1, 20428973572), (2, 10214486786), (4, 5107243393), (7, 2918424796), (14, 1459212398), (28, 729606199), (49, 416917828), (98, 208458914), (193, 105849604), (196, 104229457), (386, 52924802), (509, 40135508), (772, 26462401), (1018, 20067754), (1061, 19254452), (1351, 15121372), (2036, 10033877), (2122, 9627226), (2702, 7560686), (3563, 5733644), (4244, 4813613), (5404, 3780343), (7126, 2866822), (7427, 2750636), (9457, 2160196), (14252, 1433411), (14854, 1375318), (18914, 1080098), (24941, 819092), (29708, 687659), (37828, 540049), (49882, 409546), (51989, 392948), (98237, 207956), (99764, 204773), (103978, 196474)]