20538975

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:300

約数の個数: 48

約数和(自身を含む): 36560160

約数和(自身を除く): 16021185

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 89, 181, 255, 267, 425, 445, 543, 905, 1275, 1335, 1513, 2225, 2715, 3077, 4525, 4539, 6675, 7565, 9231, 13575, 15385, 16109, 22695, 37825, 46155, 48327, 76925, 80545, 113475, 230775, 241635, 273853, 402725, 821559, 1208175, 1369265, 4107795, 6846325, 20538975]

約数ペア:

[(1, 20538975), (3, 6846325), (5, 4107795), (15, 1369265), (17, 1208175), (25, 821559), (51, 402725), (75, 273853), (85, 241635), (89, 230775), (181, 113475), (255, 80545), (267, 76925), (425, 48327), (445, 46155), (543, 37825), (905, 22695), (1275, 16109), (1335, 15385), (1513, 13575), (2225, 9231), (2715, 7565), (3077, 6675), (4525, 4539)]