20161519495

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{2281}}^1$

素因数の和:2756

約数の個数: 64

約数和(自身を含む): 29121240960

約数和(自身を除く): 8959721465

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 421, 1105, 1235, 1615, 2105, 2281, 4199, 5473, 7157, 7999, 11405, 20995, 27365, 29653, 35785, 38777, 39995, 43339, 93041, 103987, 135983, 148265, 193885, 216695, 465205, 504101, 519935, 563407, 679915, 736763, 960301, 1767779, 2520505, 2817035, 3683815, 4801505, 8838895, 9577919, 12483913, 16325117, 18245719, 47889595, 62419565, 81625585, 91228595, 212226521, 237194347, 310177223, 1061132605, 1185971735, 1550886115, 4032303899, 20161519495]

約数ペア:

[(1, 20161519495), (5, 4032303899), (13, 1550886115), (17, 1185971735), (19, 1061132605), (65, 310177223), (85, 237194347), (95, 212226521), (221, 91228595), (247, 81625585), (323, 62419565), (421, 47889595), (1105, 18245719), (1235, 16325117), (1615, 12483913), (2105, 9577919), (2281, 8838895), (4199, 4801505), (5473, 3683815), (7157, 2817035), (7999, 2520505), (11405, 1767779), (20995, 960301), (27365, 736763), (29653, 679915), (35785, 563407), (38777, 519935), (39995, 504101), (43339, 465205), (93041, 216695), (103987, 193885), (135983, 148265)]