21812440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41947}}^1$

素因数の和:41971

約数の個数: 32

約数和(自身を含む): 52854480

約数和(自身を除く): 31042040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41947, 83894, 167788, 209735, 335576, 419470, 545311, 838940, 1090622, 1677880, 2181244, 2726555, 4362488, 5453110, 10906220, 21812440]

約数ペア:

[(1, 21812440), (2, 10906220), (4, 5453110), (5, 4362488), (8, 2726555), (10, 2181244), (13, 1677880), (20, 1090622), (26, 838940), (40, 545311), (52, 419470), (65, 335576), (104, 209735), (130, 167788), (260, 83894), (520, 41947)]