19990256

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{8737}}^1$

素因数の和:8769

約数の個数: 40

約数和(自身を含む): 45507504

約数和(自身を除く): 25517248

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 44, 52, 88, 104, 143, 176, 208, 286, 572, 1144, 2288, 8737, 17474, 34948, 69896, 96107, 113581, 139792, 192214, 227162, 384428, 454324, 768856, 908648, 1249391, 1537712, 1817296, 2498782, 4997564, 9995128, 19990256]

約数ペア:

[(1, 19990256), (2, 9995128), (4, 4997564), (8, 2498782), (11, 1817296), (13, 1537712), (16, 1249391), (22, 908648), (26, 768856), (44, 454324), (52, 384428), (88, 227162), (104, 192214), (143, 139792), (176, 113581), (208, 96107), (286, 69896), (572, 34948), (1144, 17474), (2288, 8737)]