21867880

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7489}}^1$

素因数の和:7573

約数の個数: 32

約数和(自身を含む): 49883400

約数和(自身を除く): 28015520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7489, 14978, 29956, 37445, 59912, 74890, 149780, 299560, 546697, 1093394, 2186788, 2733485, 4373576, 5466970, 10933940, 21867880]

約数ペア:

[(1, 21867880), (2, 10933940), (4, 5466970), (5, 4373576), (8, 2733485), (10, 2186788), (20, 1093394), (40, 546697), (73, 299560), (146, 149780), (292, 74890), (365, 59912), (584, 37445), (730, 29956), (1460, 14978), (2920, 7489)]