20675980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{283}}^1$

素因数の和:586

約数の個数: 48

約数和(自身を含む): 47091744

約数和(自身を除く): 26415764

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 281, 283, 562, 566, 1124, 1132, 1405, 1415, 2810, 2830, 3653, 3679, 5620, 5660, 7306, 7358, 14612, 14716, 18265, 18395, 36530, 36790, 73060, 73580, 79523, 159046, 318092, 397615, 795230, 1033799, 1590460, 2067598, 4135196, 5168995, 10337990, 20675980]

約数ペア:

[(1, 20675980), (2, 10337990), (4, 5168995), (5, 4135196), (10, 2067598), (13, 1590460), (20, 1033799), (26, 795230), (52, 397615), (65, 318092), (130, 159046), (260, 79523), (281, 73580), (283, 73060), (562, 36790), (566, 36530), (1124, 18395), (1132, 18265), (1405, 14716), (1415, 14612), (2810, 7358), (2830, 7306), (3653, 5660), (3679, 5620)]