21413756

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{661}}^1$

素因数の和:774

約数の個数: 48

約数和(自身を含む): 46710720

約数和(自身を除く): 25296964

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 89, 91, 178, 182, 356, 364, 623, 661, 1157, 1246, 1322, 2314, 2492, 2644, 4627, 4628, 8099, 8593, 9254, 16198, 17186, 18508, 32396, 34372, 58829, 60151, 117658, 120302, 235316, 240604, 411803, 764777, 823606, 1529554, 1647212, 3059108, 5353439, 10706878, 21413756]

約数ペア:

[(1, 21413756), (2, 10706878), (4, 5353439), (7, 3059108), (13, 1647212), (14, 1529554), (26, 823606), (28, 764777), (52, 411803), (89, 240604), (91, 235316), (178, 120302), (182, 117658), (356, 60151), (364, 58829), (623, 34372), (661, 32396), (1157, 18508), (1246, 17186), (1322, 16198), (2314, 9254), (2492, 8593), (2644, 8099), (4627, 4628)]