256960840

素因数分解:

$2^3\times 5^1\times {\mathrm{2389}}^1\times {\mathrm{2689}}^1$

素因数の和:5089

約数の個数: 32

約数和(自身を含む): 578619000

約数和(自身を除く): 321658160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2389, 2689, 4778, 5378, 9556, 10756, 11945, 13445, 19112, 21512, 23890, 26890, 47780, 53780, 95560, 107560, 6424021, 12848042, 25696084, 32120105, 51392168, 64240210, 128480420, 256960840]

約数ペア:

[(1, 256960840), (2, 128480420), (4, 64240210), (5, 51392168), (8, 32120105), (10, 25696084), (20, 12848042), (40, 6424021), (2389, 107560), (2689, 95560), (4778, 53780), (5378, 47780), (9556, 26890), (10756, 23890), (11945, 21512), (13445, 19112)]