31213840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{401}}^1$

素因数の和:560

約数の個数: 80

約数和(自身を含む): 83744640

約数和(自身を除く): 52530800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 139, 140, 278, 280, 401, 556, 560, 695, 802, 973, 1112, 1390, 1604, 1946, 2005, 2224, 2780, 2807, 3208, 3892, 4010, 4865, 5560, 5614, 6416, 7784, 8020, 9730, 11120, 11228, 14035, 15568, 16040, 19460, 22456, 28070, 32080, 38920, 44912, 55739, 56140, 77840, 111478, 112280, 222956, 224560, 278695, 390173, 445912, 557390, 780346, 891824, 1114780, 1560692, 1950865, 2229560, 3121384, 3901730, 4459120, 6242768, 7803460, 15606920, 31213840]

約数ペア:

[(1, 31213840), (2, 15606920), (4, 7803460), (5, 6242768), (7, 4459120), (8, 3901730), (10, 3121384), (14, 2229560), (16, 1950865), (20, 1560692), (28, 1114780), (35, 891824), (40, 780346), (56, 557390), (70, 445912), (80, 390173), (112, 278695), (139, 224560), (140, 222956), (278, 112280), (280, 111478), (401, 77840), (556, 56140), (560, 55739), (695, 44912), (802, 38920), (973, 32080), (1112, 28070), (1390, 22456), (1604, 19460), (1946, 16040), (2005, 15568), (2224, 14035), (2780, 11228), (2807, 11120), (3208, 9730), (3892, 8020), (4010, 7784), (4865, 6416), (5560, 5614)]