81878580

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{21661}}^1$

素因数の和:21686

約数の個数: 96

約数和(自身を含む): 291137280

約数和(自身を除く): 209258700

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 84, 90, 105, 108, 126, 135, 140, 180, 189, 210, 252, 270, 315, 378, 420, 540, 630, 756, 945, 1260, 1890, 3780, 21661, 43322, 64983, 86644, 108305, 129966, 151627, 194949, 216610, 259932, 303254, 324915, 389898, 433220, 454881, 584847, 606508, 649830, 758135, 779796, 909762, 974745, 1169694, 1299660, 1364643, 1516270, 1819524, 1949490, 2274405, 2339388, 2729286, 2924235, 3032540, 3898980, 4093929, 4548810, 5458572, 5848470, 6823215, 8187858, 9097620, 11696940, 13646430, 16375716, 20469645, 27292860, 40939290, 81878580]

約数ペア:

[(1, 81878580), (2, 40939290), (3, 27292860), (4, 20469645), (5, 16375716), (6, 13646430), (7, 11696940), (9, 9097620), (10, 8187858), (12, 6823215), (14, 5848470), (15, 5458572), (18, 4548810), (20, 4093929), (21, 3898980), (27, 3032540), (28, 2924235), (30, 2729286), (35, 2339388), (36, 2274405), (42, 1949490), (45, 1819524), (54, 1516270), (60, 1364643), (63, 1299660), (70, 1169694), (84, 974745), (90, 909762), (105, 779796), (108, 758135), (126, 649830), (135, 606508), (140, 584847), (180, 454881), (189, 433220), (210, 389898), (252, 324915), (270, 303254), (315, 259932), (378, 216610), (420, 194949), (540, 151627), (630, 129966), (756, 108305), (945, 86644), (1260, 64983), (1890, 43322), (3780, 21661)]