684520

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 1564200

約数和(自身を除く): 879680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 157, 218, 314, 436, 545, 628, 785, 872, 1090, 1256, 1570, 2180, 3140, 4360, 6280, 17113, 34226, 68452, 85565, 136904, 171130, 342260, 684520]

約数ペア:

[(1, 684520), (2, 342260), (4, 171130), (5, 136904), (8, 85565), (10, 68452), (20, 34226), (40, 17113), (109, 6280), (157, 4360), (218, 3140), (314, 2180), (436, 1570), (545, 1256), (628, 1090), (785, 872)]