18973955

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1$

素因数の和:276

約数の個数: 64

約数和(自身を含む): 32514048

約数和(自身を除く): 13540093

約数列:

[1, 5, 7, 11, 13, 17, 35, 55, 65, 77, 85, 91, 119, 143, 187, 221, 223, 385, 455, 595, 715, 935, 1001, 1105, 1115, 1309, 1547, 1561, 2431, 2453, 2899, 3791, 5005, 6545, 7735, 7805, 12155, 12265, 14495, 17017, 17171, 18955, 20293, 26537, 31889, 41701, 49283, 85085, 85855, 101465, 132685, 159445, 208505, 223223, 246415, 291907, 344981, 542113, 1116115, 1459535, 1724905, 2710565, 3794791, 18973955]

約数ペア:

[(1, 18973955), (5, 3794791), (7, 2710565), (11, 1724905), (13, 1459535), (17, 1116115), (35, 542113), (55, 344981), (65, 291907), (77, 246415), (85, 223223), (91, 208505), (119, 159445), (143, 132685), (187, 101465), (221, 85855), (223, 85085), (385, 49283), (455, 41701), (595, 31889), (715, 26537), (935, 20293), (1001, 18955), (1105, 17171), (1115, 17017), (1309, 14495), (1547, 12265), (1561, 12155), (2431, 7805), (2453, 7735), (2899, 6545), (3791, 5005)]