20781618515

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{727}}^1\times {\mathrm{28163}}^1$

素因数の和:28931

約数の個数: 32

約数和(自身を含む): 29524884480

約数和(自身を除く): 8743265965

約数列:

[1, 5, 7, 29, 35, 145, 203, 727, 1015, 3635, 5089, 21083, 25445, 28163, 105415, 140815, 147581, 197141, 737905, 816727, 985705, 4083635, 5717089, 20474501, 28585445, 102372505, 143321507, 593760529, 716607535, 2968802645, 4156323703, 20781618515]

約数ペア:

[(1, 20781618515), (5, 4156323703), (7, 2968802645), (29, 716607535), (35, 593760529), (145, 143321507), (203, 102372505), (727, 28585445), (1015, 20474501), (3635, 5717089), (5089, 4083635), (21083, 985705), (25445, 816727), (28163, 737905), (105415, 197141), (140815, 147581)]