20105680

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{223}}^1$

素因数の和:273

約数の個数: 120

約数和(自身を含む): 56996352

約数和(自身を除く): 36890672

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 49, 56, 70, 80, 92, 98, 112, 115, 140, 161, 184, 196, 223, 230, 245, 280, 322, 368, 392, 446, 460, 490, 560, 644, 784, 805, 892, 920, 980, 1115, 1127, 1288, 1561, 1610, 1784, 1840, 1960, 2230, 2254, 2576, 3122, 3220, 3568, 3920, 4460, 4508, 5129, 5635, 6244, 6440, 7805, 8920, 9016, 10258, 10927, 11270, 12488, 12880, 15610, 17840, 18032, 20516, 21854, 22540, 24976, 25645, 31220, 35903, 41032, 43708, 45080, 51290, 54635, 62440, 71806, 82064, 87416, 90160, 102580, 109270, 124880, 143612, 174832, 179515, 205160, 218540, 251321, 287224, 359030, 410320, 437080, 502642, 574448, 718060, 874160, 1005284, 1256605, 1436120, 2010568, 2513210, 2872240, 4021136, 5026420, 10052840, 20105680]

約数ペア:

[(1, 20105680), (2, 10052840), (4, 5026420), (5, 4021136), (7, 2872240), (8, 2513210), (10, 2010568), (14, 1436120), (16, 1256605), (20, 1005284), (23, 874160), (28, 718060), (35, 574448), (40, 502642), (46, 437080), (49, 410320), (56, 359030), (70, 287224), (80, 251321), (92, 218540), (98, 205160), (112, 179515), (115, 174832), (140, 143612), (161, 124880), (184, 109270), (196, 102580), (223, 90160), (230, 87416), (245, 82064), (280, 71806), (322, 62440), (368, 54635), (392, 51290), (446, 45080), (460, 43708), (490, 41032), (560, 35903), (644, 31220), (784, 25645), (805, 24976), (892, 22540), (920, 21854), (980, 20516), (1115, 18032), (1127, 17840), (1288, 15610), (1561, 12880), (1610, 12488), (1784, 11270), (1840, 10927), (1960, 10258), (2230, 9016), (2254, 8920), (2576, 7805), (3122, 6440), (3220, 6244), (3568, 5635), (3920, 5129), (4460, 4508)]