19901728

素因数分解:

$2^5\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:266

約数の個数: 96

約数和(自身を含む): 50295168

約数和(自身を除く): 30393440

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 41, 44, 56, 77, 82, 88, 112, 154, 164, 176, 197, 224, 287, 308, 328, 352, 394, 451, 574, 616, 656, 788, 902, 1148, 1232, 1312, 1379, 1576, 1804, 2167, 2296, 2464, 2758, 3152, 3157, 3608, 4334, 4592, 5516, 6304, 6314, 7216, 8077, 8668, 9184, 11032, 12628, 14432, 15169, 16154, 17336, 22064, 25256, 30338, 32308, 34672, 44128, 50512, 56539, 60676, 64616, 69344, 88847, 101024, 113078, 121352, 129232, 177694, 226156, 242704, 258464, 355388, 452312, 485408, 621929, 710776, 904624, 1243858, 1421552, 1809248, 2487716, 2843104, 4975432, 9950864, 19901728]

約数ペア:

[(1, 19901728), (2, 9950864), (4, 4975432), (7, 2843104), (8, 2487716), (11, 1809248), (14, 1421552), (16, 1243858), (22, 904624), (28, 710776), (32, 621929), (41, 485408), (44, 452312), (56, 355388), (77, 258464), (82, 242704), (88, 226156), (112, 177694), (154, 129232), (164, 121352), (176, 113078), (197, 101024), (224, 88847), (287, 69344), (308, 64616), (328, 60676), (352, 56539), (394, 50512), (451, 44128), (574, 34672), (616, 32308), (656, 30338), (788, 25256), (902, 22064), (1148, 17336), (1232, 16154), (1312, 15169), (1379, 14432), (1576, 12628), (1804, 11032), (2167, 9184), (2296, 8668), (2464, 8077), (2758, 7216), (3152, 6314), (3157, 6304), (3608, 5516), (4334, 4592)]