21177520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2909}}^1$

素因数の和:2942

約数の個数: 80

約数和(自身を含む): 60621120

約数和(自身を除く): 39443600

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, 2909, 3640, 5818, 7280, 11636, 14545, 20363, 23272, 29090, 37817, 40726, 46544, 58180, 75634, 81452, 101815, 116360, 151268, 162904, 189085, 203630, 232720, 264719, 302536, 325808, 378170, 407260, 529438, 605072, 756340, 814520, 1058876, 1323595, 1512680, 1629040, 2117752, 2647190, 3025360, 4235504, 5294380, 10588760, 21177520]

約数ペア:

[(1, 21177520), (2, 10588760), (4, 5294380), (5, 4235504), (7, 3025360), (8, 2647190), (10, 2117752), (13, 1629040), (14, 1512680), (16, 1323595), (20, 1058876), (26, 814520), (28, 756340), (35, 605072), (40, 529438), (52, 407260), (56, 378170), (65, 325808), (70, 302536), (80, 264719), (91, 232720), (104, 203630), (112, 189085), (130, 162904), (140, 151268), (182, 116360), (208, 101815), (260, 81452), (280, 75634), (364, 58180), (455, 46544), (520, 40726), (560, 37817), (728, 29090), (910, 23272), (1040, 20363), (1456, 14545), (1820, 11636), (2909, 7280), (3640, 5818)]