257416240

素因数分解:

$2^4\times 5^1\times {\mathrm{421}}^1\times {\mathrm{7643}}^1$

素因数の和:8077

約数の個数: 40

約数和(自身を含む): 599992848

約数和(自身を除く): 342576608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 421, 842, 1684, 2105, 3368, 4210, 6736, 7643, 8420, 15286, 16840, 30572, 33680, 38215, 61144, 76430, 122288, 152860, 305720, 611440, 3217703, 6435406, 12870812, 16088515, 25741624, 32177030, 51483248, 64354060, 128708120, 257416240]

約数ペア:

[(1, 257416240), (2, 128708120), (4, 64354060), (5, 51483248), (8, 32177030), (10, 25741624), (16, 16088515), (20, 12870812), (40, 6435406), (80, 3217703), (421, 611440), (842, 305720), (1684, 152860), (2105, 122288), (3368, 76430), (4210, 61144), (6736, 38215), (7643, 33680), (8420, 30572), (15286, 16840)]