21559456

素因数分解:

$2^5\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:317

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 22681664

約数列:

[1, 2, 4, 8, 16, 32, 37, 74, 131, 139, 148, 262, 278, 296, 524, 556, 592, 1048, 1112, 1184, 2096, 2224, 4192, 4448, 4847, 5143, 9694, 10286, 18209, 19388, 20572, 36418, 38776, 41144, 72836, 77552, 82288, 145672, 155104, 164576, 291344, 582688, 673733, 1347466, 2694932, 5389864, 10779728, 21559456]

約数ペア:

[(1, 21559456), (2, 10779728), (4, 5389864), (8, 2694932), (16, 1347466), (32, 673733), (37, 582688), (74, 291344), (131, 164576), (139, 155104), (148, 145672), (262, 82288), (278, 77552), (296, 72836), (524, 41144), (556, 38776), (592, 36418), (1048, 20572), (1112, 19388), (1184, 18209), (2096, 10286), (2224, 9694), (4192, 5143), (4448, 4847)]