30987740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{389}}^1\times {\mathrm{569}}^1$

素因数の和:974

約数の個数: 48

約数和(自身を含む): 74692800

約数和(自身を除く): 43705060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 389, 569, 778, 1138, 1556, 1945, 2276, 2723, 2845, 3890, 3983, 5446, 5690, 7780, 7966, 10892, 11380, 13615, 15932, 19915, 27230, 39830, 54460, 79660, 221341, 442682, 885364, 1106705, 1549387, 2213410, 3098774, 4426820, 6197548, 7746935, 15493870, 30987740]

約数ペア:

[(1, 30987740), (2, 15493870), (4, 7746935), (5, 6197548), (7, 4426820), (10, 3098774), (14, 2213410), (20, 1549387), (28, 1106705), (35, 885364), (70, 442682), (140, 221341), (389, 79660), (569, 54460), (778, 39830), (1138, 27230), (1556, 19915), (1945, 15932), (2276, 13615), (2723, 11380), (2845, 10892), (3890, 7966), (3983, 7780), (5446, 5690)]