28778820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{68521}}^1$

素因数の和:68540

約数の個数: 48

約数和(自身を含む): 92093568

約数和(自身を除く): 63314748

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 68521, 137042, 205563, 274084, 342605, 411126, 479647, 685210, 822252, 959294, 1027815, 1370420, 1438941, 1918588, 2055630, 2398235, 2877882, 4111260, 4796470, 5755764, 7194705, 9592940, 14389410, 28778820]

約数ペア:

[(1, 28778820), (2, 14389410), (3, 9592940), (4, 7194705), (5, 5755764), (6, 4796470), (7, 4111260), (10, 2877882), (12, 2398235), (14, 2055630), (15, 1918588), (20, 1438941), (21, 1370420), (28, 1027815), (30, 959294), (35, 822252), (42, 685210), (60, 479647), (70, 411126), (84, 342605), (105, 274084), (140, 205563), (210, 137042), (420, 68521)]