20128455

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 36900864

約数和(自身を除く): 16772409

約数列:

[1, 3, 5, 9, 15, 31, 45, 47, 93, 141, 155, 235, 279, 307, 423, 465, 705, 921, 1395, 1457, 1535, 2115, 2763, 4371, 4605, 7285, 9517, 13113, 13815, 14429, 21855, 28551, 43287, 47585, 65565, 72145, 85653, 129861, 142755, 216435, 428265, 447299, 649305, 1341897, 2236495, 4025691, 6709485, 20128455]

約数ペア:

[(1, 20128455), (3, 6709485), (5, 4025691), (9, 2236495), (15, 1341897), (31, 649305), (45, 447299), (47, 428265), (93, 216435), (141, 142755), (155, 129861), (235, 85653), (279, 72145), (307, 65565), (423, 47585), (465, 43287), (705, 28551), (921, 21855), (1395, 14429), (1457, 13815), (1535, 13113), (2115, 9517), (2763, 7285), (4371, 4605)]