20085075

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:181

約数の個数: 72

約数和(自身を含む): 39171600

約数和(自身を除く): 19086525

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 59, 75, 85, 89, 153, 177, 225, 255, 267, 295, 425, 445, 531, 765, 801, 885, 1003, 1275, 1335, 1475, 1513, 2225, 2655, 3009, 3825, 4005, 4425, 4539, 5015, 5251, 6675, 7565, 9027, 13275, 13617, 15045, 15753, 20025, 22695, 25075, 26255, 37825, 45135, 47259, 68085, 75225, 78765, 89267, 113475, 131275, 225675, 236295, 267801, 340425, 393825, 446335, 803403, 1181475, 1339005, 2231675, 4017015, 6695025, 20085075]

約数ペア:

[(1, 20085075), (3, 6695025), (5, 4017015), (9, 2231675), (15, 1339005), (17, 1181475), (25, 803403), (45, 446335), (51, 393825), (59, 340425), (75, 267801), (85, 236295), (89, 225675), (153, 131275), (177, 113475), (225, 89267), (255, 78765), (267, 75225), (295, 68085), (425, 47259), (445, 45135), (531, 37825), (765, 26255), (801, 25075), (885, 22695), (1003, 20025), (1275, 15753), (1335, 15045), (1475, 13617), (1513, 13275), (2225, 9027), (2655, 7565), (3009, 6675), (3825, 5251), (4005, 5015), (4425, 4539)]