21000691760

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{593}}^1\times {\mathrm{2971}}^1$

素因数の和:3726

約数の個数: 80

約数和(自身を含む): 49253767200

約数和(自身を除く): 28253075440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 593, 596, 745, 1186, 1192, 1490, 2372, 2384, 2965, 2971, 2980, 4744, 5930, 5942, 5960, 9488, 11860, 11884, 11920, 14855, 23720, 23768, 29710, 47440, 47536, 59420, 88357, 118840, 176714, 237680, 353428, 441785, 442679, 706856, 883570, 885358, 1413712, 1761803, 1767140, 1770716, 2213395, 3523606, 3534280, 3541432, 4426790, 7047212, 7068560, 7082864, 8809015, 8853580, 14094424, 17618030, 17707160, 28188848, 35236060, 35414320, 70472120, 140944240, 262508647, 525017294, 1050034588, 1312543235, 2100069176, 2625086470, 4200138352, 5250172940, 10500345880, 21000691760]

約数ペア:

[(1, 21000691760), (2, 10500345880), (4, 5250172940), (5, 4200138352), (8, 2625086470), (10, 2100069176), (16, 1312543235), (20, 1050034588), (40, 525017294), (80, 262508647), (149, 140944240), (298, 70472120), (593, 35414320), (596, 35236060), (745, 28188848), (1186, 17707160), (1192, 17618030), (1490, 14094424), (2372, 8853580), (2384, 8809015), (2965, 7082864), (2971, 7068560), (2980, 7047212), (4744, 4426790), (5930, 3541432), (5942, 3534280), (5960, 3523606), (9488, 2213395), (11860, 1770716), (11884, 1767140), (11920, 1761803), (14855, 1413712), (23720, 885358), (23768, 883570), (29710, 706856), (47440, 442679), (47536, 441785), (59420, 353428), (88357, 237680), (118840, 176714)]