21508720

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 52853760

約数和(自身を除く): 31345040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 73, 80, 116, 127, 145, 146, 232, 254, 290, 292, 365, 464, 508, 580, 584, 635, 730, 1016, 1160, 1168, 1270, 1460, 2032, 2117, 2320, 2540, 2920, 3683, 4234, 5080, 5840, 7366, 8468, 9271, 10160, 10585, 14732, 16936, 18415, 18542, 21170, 29464, 33872, 36830, 37084, 42340, 46355, 58928, 73660, 74168, 84680, 92710, 147320, 148336, 169360, 185420, 268859, 294640, 370840, 537718, 741680, 1075436, 1344295, 2150872, 2688590, 4301744, 5377180, 10754360, 21508720]

約数ペア:

[(1, 21508720), (2, 10754360), (4, 5377180), (5, 4301744), (8, 2688590), (10, 2150872), (16, 1344295), (20, 1075436), (29, 741680), (40, 537718), (58, 370840), (73, 294640), (80, 268859), (116, 185420), (127, 169360), (145, 148336), (146, 147320), (232, 92710), (254, 84680), (290, 74168), (292, 73660), (365, 58928), (464, 46355), (508, 42340), (580, 37084), (584, 36830), (635, 33872), (730, 29464), (1016, 21170), (1160, 18542), (1168, 18415), (1270, 16936), (1460, 14732), (2032, 10585), (2117, 10160), (2320, 9271), (2540, 8468), (2920, 7366), (3683, 5840), (4234, 5080)]