20940855

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6317}}^1$

素因数の和:6355

約数の個数: 32

約数和(自身を含む): 38211264

約数和(自身を除く): 17270409

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6317, 18951, 31585, 82121, 94755, 107389, 246363, 322167, 410605, 536945, 1231815, 1396057, 1610835, 4188171, 6980285, 20940855]

約数ペア:

[(1, 20940855), (3, 6980285), (5, 4188171), (13, 1610835), (15, 1396057), (17, 1231815), (39, 536945), (51, 410605), (65, 322167), (85, 246363), (195, 107389), (221, 94755), (255, 82121), (663, 31585), (1105, 18951), (3315, 6317)]