20853235

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 28385280

約数和(自身を除く): 7532045

約数列:

[1, 5, 13, 31, 65, 79, 131, 155, 395, 403, 655, 1027, 1703, 2015, 2449, 4061, 5135, 8515, 10349, 12245, 20305, 31837, 51745, 52793, 134537, 159185, 263965, 320819, 672685, 1604095, 4170647, 20853235]

約数ペア:

[(1, 20853235), (5, 4170647), (13, 1604095), (31, 672685), (65, 320819), (79, 263965), (131, 159185), (155, 134537), (395, 52793), (403, 51745), (655, 31837), (1027, 20305), (1703, 12245), (2015, 10349), (2449, 8515), (4061, 5135)]