20178928

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1489}}^1$

素因数の和:1526

約数の個数: 60

約数和(自身を含む): 49146160

約数和(自身を除く): 28967232

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 56, 77, 88, 112, 121, 154, 176, 242, 308, 484, 616, 847, 968, 1232, 1489, 1694, 1936, 2978, 3388, 5956, 6776, 10423, 11912, 13552, 16379, 20846, 23824, 32758, 41692, 65516, 83384, 114653, 131032, 166768, 180169, 229306, 262064, 360338, 458612, 720676, 917224, 1261183, 1441352, 1834448, 2522366, 2882704, 5044732, 10089464, 20178928]

約数ペア:

[(1, 20178928), (2, 10089464), (4, 5044732), (7, 2882704), (8, 2522366), (11, 1834448), (14, 1441352), (16, 1261183), (22, 917224), (28, 720676), (44, 458612), (56, 360338), (77, 262064), (88, 229306), (112, 180169), (121, 166768), (154, 131032), (176, 114653), (242, 83384), (308, 65516), (484, 41692), (616, 32758), (847, 23824), (968, 20846), (1232, 16379), (1489, 13552), (1694, 11912), (1936, 10423), (2978, 6776), (3388, 5956)]