31998040

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 74844000

約数和(自身を除く): 42845960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 109, 164, 179, 205, 218, 328, 358, 410, 436, 545, 716, 820, 872, 895, 1090, 1432, 1640, 1790, 2180, 3580, 4360, 4469, 7160, 7339, 8938, 14678, 17876, 19511, 22345, 29356, 35752, 36695, 39022, 44690, 58712, 73390, 78044, 89380, 97555, 146780, 156088, 178760, 195110, 293560, 390220, 780440, 799951, 1599902, 3199804, 3999755, 6399608, 7999510, 15999020, 31998040]

約数ペア:

[(1, 31998040), (2, 15999020), (4, 7999510), (5, 6399608), (8, 3999755), (10, 3199804), (20, 1599902), (40, 799951), (41, 780440), (82, 390220), (109, 293560), (164, 195110), (179, 178760), (205, 156088), (218, 146780), (328, 97555), (358, 89380), (410, 78044), (436, 73390), (545, 58712), (716, 44690), (820, 39022), (872, 36695), (895, 35752), (1090, 29356), (1432, 22345), (1640, 19511), (1790, 17876), (2180, 14678), (3580, 8938), (4360, 7339), (4469, 7160)]