21390530

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{431}}^1\times {\mathrm{709}}^1$

素因数の和:1154

約数の個数: 32

約数和(自身を含む): 44167680

約数和(自身を除く): 22777150

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 431, 709, 862, 1418, 2155, 3017, 3545, 4310, 4963, 6034, 7090, 9926, 15085, 24815, 30170, 49630, 305579, 611158, 1527895, 2139053, 3055790, 4278106, 10695265, 21390530]

約数ペア:

[(1, 21390530), (2, 10695265), (5, 4278106), (7, 3055790), (10, 2139053), (14, 1527895), (35, 611158), (70, 305579), (431, 49630), (709, 30170), (862, 24815), (1418, 15085), (2155, 9926), (3017, 7090), (3545, 6034), (4310, 4963)]