21283065

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 40030848

約数和(自身を除く): 18747783

約数列:

[1, 3, 5, 9, 15, 17, 43, 45, 51, 85, 129, 153, 215, 255, 387, 645, 647, 731, 765, 1935, 1941, 2193, 3235, 3655, 5823, 6579, 9705, 10965, 10999, 27821, 29115, 32895, 32997, 54995, 83463, 98991, 139105, 164985, 250389, 417315, 472957, 494955, 1251945, 1418871, 2364785, 4256613, 7094355, 21283065]

約数ペア:

[(1, 21283065), (3, 7094355), (5, 4256613), (9, 2364785), (15, 1418871), (17, 1251945), (43, 494955), (45, 472957), (51, 417315), (85, 250389), (129, 164985), (153, 139105), (215, 98991), (255, 83463), (387, 54995), (645, 32997), (647, 32895), (731, 29115), (765, 27821), (1935, 10999), (1941, 10965), (2193, 9705), (3235, 6579), (3655, 5823)]