21880785

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1619}}^1$

素因数の和:1697

約数の個数: 32

約数和(自身を含む): 37791360

約数和(自身を除く): 15910575

約数列:

[1, 3, 5, 15, 17, 51, 53, 85, 159, 255, 265, 795, 901, 1619, 2703, 4505, 4857, 8095, 13515, 24285, 27523, 82569, 85807, 137615, 257421, 412845, 429035, 1287105, 1458719, 4376157, 7293595, 21880785]

約数ペア:

[(1, 21880785), (3, 7293595), (5, 4376157), (15, 1458719), (17, 1287105), (51, 429035), (53, 412845), (85, 257421), (159, 137615), (255, 85807), (265, 82569), (795, 27523), (901, 24285), (1619, 13515), (2703, 8095), (4505, 4857)]