81818145

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{659}}^1$

素因数の和:790

約数の個数: 48

約数和(自身を含む): 148262400

約数和(自身を除く): 66444255

約数列:

[1, 3, 5, 9, 15, 31, 45, 89, 93, 155, 267, 279, 445, 465, 659, 801, 1335, 1395, 1977, 2759, 3295, 4005, 5931, 8277, 9885, 13795, 20429, 24831, 29655, 41385, 58651, 61287, 102145, 124155, 175953, 183861, 293255, 306435, 527859, 879765, 919305, 1818181, 2639295, 5454543, 9090905, 16363629, 27272715, 81818145]

約数ペア:

[(1, 81818145), (3, 27272715), (5, 16363629), (9, 9090905), (15, 5454543), (31, 2639295), (45, 1818181), (89, 919305), (93, 879765), (155, 527859), (267, 306435), (279, 293255), (445, 183861), (465, 175953), (659, 124155), (801, 102145), (1335, 61287), (1395, 58651), (1977, 41385), (2759, 29655), (3295, 24831), (4005, 20429), (5931, 13795), (8277, 9885)]