18866385

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 35712000

約数和(自身を除く): 16845615

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 61, 79, 87, 135, 145, 183, 237, 261, 305, 395, 435, 549, 711, 783, 915, 1185, 1305, 1647, 1769, 2133, 2291, 2745, 3555, 3915, 4819, 5307, 6873, 8235, 8845, 10665, 11455, 14457, 15921, 20619, 24095, 26535, 34365, 43371, 47763, 61857, 72285, 79605, 103095, 130113, 139751, 216855, 238815, 309285, 419253, 650565, 698755, 1257759, 2096265, 3773277, 6288795, 18866385]

約数ペア:

[(1, 18866385), (3, 6288795), (5, 3773277), (9, 2096265), (15, 1257759), (27, 698755), (29, 650565), (45, 419253), (61, 309285), (79, 238815), (87, 216855), (135, 139751), (145, 130113), (183, 103095), (237, 79605), (261, 72285), (305, 61857), (395, 47763), (435, 43371), (549, 34365), (711, 26535), (783, 24095), (915, 20619), (1185, 15921), (1305, 14457), (1647, 11455), (1769, 10665), (2133, 8845), (2291, 8235), (2745, 6873), (3555, 5307), (3915, 4819)]