20544580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{571}}^1$

素因数の和:844

約数の個数: 48

約数和(自身を含む): 49585536

約数和(自身を除く): 29040956

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 257, 514, 571, 1028, 1142, 1285, 1799, 2284, 2570, 2855, 3598, 3997, 5140, 5710, 7196, 7994, 8995, 11420, 15988, 17990, 19985, 35980, 39970, 79940, 146747, 293494, 586988, 733735, 1027229, 1467470, 2054458, 2934940, 4108916, 5136145, 10272290, 20544580]

約数ペア:

[(1, 20544580), (2, 10272290), (4, 5136145), (5, 4108916), (7, 2934940), (10, 2054458), (14, 1467470), (20, 1027229), (28, 733735), (35, 586988), (70, 293494), (140, 146747), (257, 79940), (514, 39970), (571, 35980), (1028, 19985), (1142, 17990), (1285, 15988), (1799, 11420), (2284, 8995), (2570, 7994), (2855, 7196), (3598, 5710), (3997, 5140)]