20921230

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{2137}}^1$

素因数の和:2244

約数の個数: 32

約数和(自身を含む): 41562720

約数和(自身を除く): 20641490

約数列:

[1, 2, 5, 10, 11, 22, 55, 89, 110, 178, 445, 890, 979, 1958, 2137, 4274, 4895, 9790, 10685, 21370, 23507, 47014, 117535, 190193, 235070, 380386, 950965, 1901930, 2092123, 4184246, 10460615, 20921230]

約数ペア:

[(1, 20921230), (2, 10460615), (5, 4184246), (10, 2092123), (11, 1901930), (22, 950965), (55, 380386), (89, 235070), (110, 190193), (178, 117535), (445, 47014), (890, 23507), (979, 21370), (1958, 10685), (2137, 9790), (4274, 4895)]