256417840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{457889}}^1$

素因数の和:457909

約数の個数: 40

約数和(自身を含む): 681340320

約数和(自身を除く): 424922480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 457889, 915778, 1831556, 2289445, 3205223, 3663112, 4578890, 6410446, 7326224, 9157780, 12820892, 16026115, 18315560, 25641784, 32052230, 36631120, 51283568, 64104460, 128208920, 256417840]

約数ペア:

[(1, 256417840), (2, 128208920), (4, 64104460), (5, 51283568), (7, 36631120), (8, 32052230), (10, 25641784), (14, 18315560), (16, 16026115), (20, 12820892), (28, 9157780), (35, 7326224), (40, 6410446), (56, 4578890), (70, 3663112), (80, 3205223), (112, 2289445), (140, 1831556), (280, 915778), (560, 457889)]