81389525

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{277}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 122444544

約数和(自身を除く): 41055019

約数列:

[1, 5, 7, 23, 25, 35, 73, 115, 161, 175, 277, 365, 511, 575, 805, 1385, 1679, 1825, 1939, 2555, 4025, 6371, 6925, 8395, 9695, 11753, 12775, 20221, 31855, 41975, 44597, 48475, 58765, 101105, 141547, 159275, 222985, 293825, 465083, 505525, 707735, 1114925, 2325415, 3255581, 3538675, 11627075, 16277905, 81389525]

約数ペア:

[(1, 81389525), (5, 16277905), (7, 11627075), (23, 3538675), (25, 3255581), (35, 2325415), (73, 1114925), (115, 707735), (161, 505525), (175, 465083), (277, 293825), (365, 222985), (511, 159275), (575, 141547), (805, 101105), (1385, 58765), (1679, 48475), (1825, 44597), (1939, 41975), (2555, 31855), (4025, 20221), (6371, 12775), (6925, 11753), (8395, 9695)]