20406520

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{541}}^1$

素因数の和:616

約数の個数: 64

約数和(自身を含む): 49170240

約数和(自身を除く): 28763720

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 41, 46, 82, 92, 115, 164, 184, 205, 230, 328, 410, 460, 541, 820, 920, 943, 1082, 1640, 1886, 2164, 2705, 3772, 4328, 4715, 5410, 7544, 9430, 10820, 12443, 18860, 21640, 22181, 24886, 37720, 44362, 49772, 62215, 88724, 99544, 110905, 124430, 177448, 221810, 248860, 443620, 497720, 510163, 887240, 1020326, 2040652, 2550815, 4081304, 5101630, 10203260, 20406520]

約数ペア:

[(1, 20406520), (2, 10203260), (4, 5101630), (5, 4081304), (8, 2550815), (10, 2040652), (20, 1020326), (23, 887240), (40, 510163), (41, 497720), (46, 443620), (82, 248860), (92, 221810), (115, 177448), (164, 124430), (184, 110905), (205, 99544), (230, 88724), (328, 62215), (410, 49772), (460, 44362), (541, 37720), (820, 24886), (920, 22181), (943, 21640), (1082, 18860), (1640, 12443), (1886, 10820), (2164, 9430), (2705, 7544), (3772, 5410), (4328, 4715)]