21507668

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{367}}^1$

素因数の和:421

約数の個数: 72

約数和(自身を含む): 49335552

約数和(自身を除く): 27827884

約数列:

[1, 2, 4, 7, 13, 14, 23, 26, 28, 46, 49, 52, 91, 92, 98, 161, 182, 196, 299, 322, 364, 367, 598, 637, 644, 734, 1127, 1196, 1274, 1468, 2093, 2254, 2548, 2569, 4186, 4508, 4771, 5138, 8372, 8441, 9542, 10276, 14651, 16882, 17983, 19084, 29302, 33397, 33764, 35966, 58604, 59087, 66794, 71932, 109733, 118174, 133588, 219466, 233779, 236348, 413609, 438932, 467558, 768131, 827218, 935116, 1536262, 1654436, 3072524, 5376917, 10753834, 21507668]

約数ペア:

[(1, 21507668), (2, 10753834), (4, 5376917), (7, 3072524), (13, 1654436), (14, 1536262), (23, 935116), (26, 827218), (28, 768131), (46, 467558), (49, 438932), (52, 413609), (91, 236348), (92, 233779), (98, 219466), (161, 133588), (182, 118174), (196, 109733), (299, 71932), (322, 66794), (364, 59087), (367, 58604), (598, 35966), (637, 33764), (644, 33397), (734, 29302), (1127, 19084), (1196, 17983), (1274, 16882), (1468, 14651), (2093, 10276), (2254, 9542), (2548, 8441), (2569, 8372), (4186, 5138), (4508, 4771)]