12885980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 28607040

約数和(自身を除く): 15721060

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 109, 115, 218, 230, 257, 436, 460, 514, 545, 1028, 1090, 1285, 2180, 2507, 2570, 5014, 5140, 5911, 10028, 11822, 12535, 23644, 25070, 28013, 29555, 50140, 56026, 59110, 112052, 118220, 140065, 280130, 560260, 644299, 1288598, 2577196, 3221495, 6442990, 12885980]

約数ペア:

[(1, 12885980), (2, 6442990), (4, 3221495), (5, 2577196), (10, 1288598), (20, 644299), (23, 560260), (46, 280130), (92, 140065), (109, 118220), (115, 112052), (218, 59110), (230, 56026), (257, 50140), (436, 29555), (460, 28013), (514, 25070), (545, 23644), (1028, 12535), (1090, 11822), (1285, 10028), (2180, 5911), (2507, 5140), (2570, 5014)]