19997703076

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{691}}^1\times {\mathrm{1381}}^1$

素因数の和:2133

約数の個数: 72

約数和(自身を含む): 39202453248

約数和(自身を除く): 19204750172

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 124, 169, 338, 403, 676, 691, 806, 1381, 1382, 1612, 2762, 2764, 5239, 5524, 8983, 10478, 17953, 17966, 20956, 21421, 35906, 35932, 42811, 42842, 71812, 85622, 85684, 116779, 171244, 233389, 233558, 278473, 466778, 467116, 556543, 556946, 933556, 954271, 1113086, 1113892, 1908542, 2226172, 3620149, 3817084, 7235059, 7240298, 12405523, 14470118, 14480596, 24811046, 28940236, 29582401, 49622092, 59164802, 118329604, 161271799, 322543598, 384571213, 645087196, 769142426, 1538284852, 4999425769, 9998851538, 19997703076]

約数ペア:

[(1, 19997703076), (2, 9998851538), (4, 4999425769), (13, 1538284852), (26, 769142426), (31, 645087196), (52, 384571213), (62, 322543598), (124, 161271799), (169, 118329604), (338, 59164802), (403, 49622092), (676, 29582401), (691, 28940236), (806, 24811046), (1381, 14480596), (1382, 14470118), (1612, 12405523), (2762, 7240298), (2764, 7235059), (5239, 3817084), (5524, 3620149), (8983, 2226172), (10478, 1908542), (17953, 1113892), (17966, 1113086), (20956, 954271), (21421, 933556), (35906, 556946), (35932, 556543), (42811, 467116), (42842, 466778), (71812, 278473), (85622, 233558), (85684, 233389), (116779, 171244)]