21813844

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{23}}^2\times {\mathrm{61}}^1$

素因数の和:137

約数の個数: 54

約数和(自身を含む): 43920366

約数和(自身を除く): 22106522

約数列:

[1, 2, 4, 13, 23, 26, 46, 52, 61, 92, 122, 169, 244, 299, 338, 529, 598, 676, 793, 1058, 1196, 1403, 1586, 2116, 2806, 3172, 3887, 5612, 6877, 7774, 10309, 13754, 15548, 18239, 20618, 27508, 32269, 36478, 41236, 64538, 72956, 89401, 129076, 178802, 237107, 357604, 419497, 474214, 838994, 948428, 1677988, 5453461, 10906922, 21813844]

約数ペア:

[(1, 21813844), (2, 10906922), (4, 5453461), (13, 1677988), (23, 948428), (26, 838994), (46, 474214), (52, 419497), (61, 357604), (92, 237107), (122, 178802), (169, 129076), (244, 89401), (299, 72956), (338, 64538), (529, 41236), (598, 36478), (676, 32269), (793, 27508), (1058, 20618), (1196, 18239), (1403, 15548), (1586, 13754), (2116, 10309), (2806, 7774), (3172, 6877), (3887, 5612)]