20464990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{523}}^1$

素因数の和:593

約数の個数: 64

約数和(自身を含む): 46480896

約数和(自身を除く): 26015906

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 43, 65, 70, 86, 91, 130, 182, 215, 301, 430, 455, 523, 559, 602, 910, 1046, 1118, 1505, 2615, 2795, 3010, 3661, 3913, 5230, 5590, 6799, 7322, 7826, 13598, 18305, 19565, 22489, 33995, 36610, 39130, 44978, 47593, 67990, 95186, 112445, 157423, 224890, 237965, 292357, 314846, 475930, 584714, 787115, 1461785, 1574230, 2046499, 2923570, 4092998, 10232495, 20464990]

約数ペア:

[(1, 20464990), (2, 10232495), (5, 4092998), (7, 2923570), (10, 2046499), (13, 1574230), (14, 1461785), (26, 787115), (35, 584714), (43, 475930), (65, 314846), (70, 292357), (86, 237965), (91, 224890), (130, 157423), (182, 112445), (215, 95186), (301, 67990), (430, 47593), (455, 44978), (523, 39130), (559, 36610), (602, 33995), (910, 22489), (1046, 19565), (1118, 18305), (1505, 13598), (2615, 7826), (2795, 7322), (3010, 6799), (3661, 5590), (3913, 5230)]