18860560

素因数分解:

$2^4\times 5^1\times {\mathrm{431}}^1\times {\mathrm{547}}^1$

素因数の和:991

約数の個数: 40

約数和(自身を含む): 44032896

約数和(自身を除く): 25172336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 431, 547, 862, 1094, 1724, 2155, 2188, 2735, 3448, 4310, 4376, 5470, 6896, 8620, 8752, 10940, 17240, 21880, 34480, 43760, 235757, 471514, 943028, 1178785, 1886056, 2357570, 3772112, 4715140, 9430280, 18860560]

約数ペア:

[(1, 18860560), (2, 9430280), (4, 4715140), (5, 3772112), (8, 2357570), (10, 1886056), (16, 1178785), (20, 943028), (40, 471514), (80, 235757), (431, 43760), (547, 34480), (862, 21880), (1094, 17240), (1724, 10940), (2155, 8752), (2188, 8620), (2735, 6896), (3448, 5470), (4310, 4376)]