81349380

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{21521}}^1$

素因数の和:21546

約数の個数: 96

約数和(自身を含む): 289255680

約数和(自身を除く): 207906300

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, 21521, 43042, 64563, 86084, 107605, 129126, 150647, 193689, 215210, 258252, 301294, 322815, 387378, 430420, 451941, 581067, 602588, 645630, 753235, 774756, 903882, 968445, 1162134, 1291260, 1355823, 1506470, 1807764, 1936890, 2259705, 2324268, 2711646, 2905335, 3012940, 3873780, 4067469, 4519410, 5423292, 5810670, 6779115, 8134938, 9038820, 11621340, 13558230, 16269876, 20337345, 27116460, 40674690, 81349380]

約数ペア:

[(1, 81349380), (2, 40674690), (3, 27116460), (4, 20337345), (5, 16269876), (6, 13558230), (7, 11621340), (9, 9038820), (10, 8134938), (12, 6779115), (14, 5810670), (15, 5423292), (18, 4519410), (20, 4067469), (21, 3873780), (27, 3012940), (28, 2905335), (30, 2711646), (35, 2324268), (36, 2259705), (42, 1936890), (45, 1807764), (54, 1506470), (60, 1355823), (63, 1291260), (70, 1162134), (84, 968445), (90, 903882), (105, 774756), (108, 753235), (126, 645630), (135, 602588), (140, 581067), (180, 451941), (189, 430420), (210, 387378), (252, 322815), (270, 301294), (315, 258252), (378, 215210), (420, 193689), (540, 150647), (630, 129126), (756, 107605), (945, 86084), (1260, 64563), (1890, 43042), (3780, 21521)]