21133840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2903}}^1$

素因数の和:2936

約数の個数: 80

約数和(自身を含む): 60496128

約数和(自身を除く): 39362288

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2903, 3640, 5806, 7280, 11612, 14515, 20321, 23224, 29030, 37739, 40642, 46448, 58060, 75478, 81284, 101605, 116120, 150956, 162568, 188695, 203210, 232240, 264173, 301912, 325136, 377390, 406420, 528346, 603824, 754780, 812840, 1056692, 1320865, 1509560, 1625680, 2113384, 2641730, 3019120, 4226768, 5283460, 10566920, 21133840]

約数ペア:

[(1, 21133840), (2, 10566920), (4, 5283460), (5, 4226768), (7, 3019120), (8, 2641730), (10, 2113384), (13, 1625680), (14, 1509560), (16, 1320865), (20, 1056692), (26, 812840), (28, 754780), (35, 603824), (40, 528346), (52, 406420), (56, 377390), (65, 325136), (70, 301912), (80, 264173), (91, 232240), (104, 203210), (112, 188695), (130, 162568), (140, 150956), (182, 116120), (208, 101605), (260, 81284), (280, 75478), (364, 58060), (455, 46448), (520, 40642), (560, 37739), (728, 29030), (910, 23224), (1040, 20321), (1456, 14515), (1820, 11612), (2903, 7280), (3640, 5806)]