20784820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{167}}^1$

素因数の和:317

約数の個数: 72

約数和(自身を含む): 51480576

約数和(自身を除く): 30695756

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 127, 140, 167, 196, 245, 254, 334, 490, 508, 635, 668, 835, 889, 980, 1169, 1270, 1670, 1778, 2338, 2540, 3340, 3556, 4445, 4676, 5845, 6223, 8183, 8890, 11690, 12446, 16366, 17780, 21209, 23380, 24892, 31115, 32732, 40915, 42418, 62230, 81830, 84836, 106045, 124460, 148463, 163660, 212090, 296926, 424180, 593852, 742315, 1039241, 1484630, 2078482, 2969260, 4156964, 5196205, 10392410, 20784820]

約数ペア:

[(1, 20784820), (2, 10392410), (4, 5196205), (5, 4156964), (7, 2969260), (10, 2078482), (14, 1484630), (20, 1039241), (28, 742315), (35, 593852), (49, 424180), (70, 296926), (98, 212090), (127, 163660), (140, 148463), (167, 124460), (196, 106045), (245, 84836), (254, 81830), (334, 62230), (490, 42418), (508, 40915), (635, 32732), (668, 31115), (835, 24892), (889, 23380), (980, 21209), (1169, 17780), (1270, 16366), (1670, 12446), (1778, 11690), (2338, 8890), (2540, 8183), (3340, 6223), (3556, 5845), (4445, 4676)]