20625213

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1\times {\mathrm{137}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 32431104

約数和(自身を除く): 11805891

約数列:

[1, 3, 7, 21, 67, 107, 137, 201, 321, 411, 469, 749, 959, 1407, 2247, 2877, 7169, 9179, 14659, 21507, 27537, 43977, 50183, 64253, 102613, 150549, 192759, 307839, 982153, 2946459, 6875071, 20625213]

約数ペア:

[(1, 20625213), (3, 6875071), (7, 2946459), (21, 982153), (67, 307839), (107, 192759), (137, 150549), (201, 102613), (321, 64253), (411, 50183), (469, 43977), (749, 27537), (959, 21507), (1407, 14659), (2247, 9179), (2877, 7169)]