21569765

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{269}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 9534235

約数列:

[1, 5, 7, 29, 35, 79, 145, 203, 269, 395, 553, 1015, 1345, 1883, 2291, 2765, 7801, 9415, 11455, 16037, 21251, 39005, 54607, 80185, 106255, 148757, 273035, 616279, 743785, 3081395, 4313953, 21569765]

約数ペア:

[(1, 21569765), (5, 4313953), (7, 3081395), (29, 743785), (35, 616279), (79, 273035), (145, 148757), (203, 106255), (269, 80185), (395, 54607), (553, 39005), (1015, 21251), (1345, 16037), (1883, 11455), (2291, 9415), (2765, 7801)]