20937280

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{719}}^1$

素因数の和:756

約数の個数: 112

約数和(自身を含む): 61447680

約数和(自身を除く): 40510400

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 64, 65, 70, 80, 91, 104, 112, 130, 140, 160, 182, 208, 224, 260, 280, 320, 364, 416, 448, 455, 520, 560, 719, 728, 832, 910, 1040, 1120, 1438, 1456, 1820, 2080, 2240, 2876, 2912, 3595, 3640, 4160, 5033, 5752, 5824, 7190, 7280, 9347, 10066, 11504, 14380, 14560, 18694, 20132, 23008, 25165, 28760, 29120, 37388, 40264, 46016, 46735, 50330, 57520, 65429, 74776, 80528, 93470, 100660, 115040, 130858, 149552, 161056, 186940, 201320, 230080, 261716, 299104, 322112, 327145, 373880, 402640, 523432, 598208, 654290, 747760, 805280, 1046864, 1308580, 1495520, 1610560, 2093728, 2617160, 2991040, 4187456, 5234320, 10468640, 20937280]

約数ペア:

[(1, 20937280), (2, 10468640), (4, 5234320), (5, 4187456), (7, 2991040), (8, 2617160), (10, 2093728), (13, 1610560), (14, 1495520), (16, 1308580), (20, 1046864), (26, 805280), (28, 747760), (32, 654290), (35, 598208), (40, 523432), (52, 402640), (56, 373880), (64, 327145), (65, 322112), (70, 299104), (80, 261716), (91, 230080), (104, 201320), (112, 186940), (130, 161056), (140, 149552), (160, 130858), (182, 115040), (208, 100660), (224, 93470), (260, 80528), (280, 74776), (320, 65429), (364, 57520), (416, 50330), (448, 46735), (455, 46016), (520, 40264), (560, 37388), (719, 29120), (728, 28760), (832, 25165), (910, 23008), (1040, 20132), (1120, 18694), (1438, 14560), (1456, 14380), (1820, 11504), (2080, 10066), (2240, 9347), (2876, 7280), (2912, 7190), (3595, 5824), (3640, 5752), (4160, 5033)]