19908819

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{641}}^1$

素因数の和:700

約数の個数: 48

約数和(自身を含む): 36054720

約数和(自身を除く): 16145901

約数列:

[1, 3, 7, 9, 17, 21, 29, 51, 63, 87, 119, 153, 203, 261, 357, 493, 609, 641, 1071, 1479, 1827, 1923, 3451, 4437, 4487, 5769, 10353, 10897, 13461, 18589, 31059, 32691, 40383, 55767, 76279, 98073, 130123, 167301, 228837, 316013, 390369, 686511, 948039, 1171107, 2212091, 2844117, 6636273, 19908819]

約数ペア:

[(1, 19908819), (3, 6636273), (7, 2844117), (9, 2212091), (17, 1171107), (21, 948039), (29, 686511), (51, 390369), (63, 316013), (87, 228837), (119, 167301), (153, 130123), (203, 98073), (261, 76279), (357, 55767), (493, 40383), (609, 32691), (641, 31059), (1071, 18589), (1479, 13461), (1827, 10897), (1923, 10353), (3451, 5769), (4437, 4487)]