21180208

素因数分解:

$2^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{6521}}^1$

素因数の和:6565

約数の個数: 40

約数和(自身を含む): 48523680

約数和(自身を除く): 27343472

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 29, 56, 58, 112, 116, 203, 232, 406, 464, 812, 1624, 3248, 6521, 13042, 26084, 45647, 52168, 91294, 104336, 182588, 189109, 365176, 378218, 730352, 756436, 1323763, 1512872, 2647526, 3025744, 5295052, 10590104, 21180208]

約数ペア:

[(1, 21180208), (2, 10590104), (4, 5295052), (7, 3025744), (8, 2647526), (14, 1512872), (16, 1323763), (28, 756436), (29, 730352), (56, 378218), (58, 365176), (112, 189109), (116, 182588), (203, 104336), (232, 91294), (406, 52168), (464, 45647), (812, 26084), (1624, 13042), (3248, 6521)]