20680920

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{491}}^1$

素因数の和:527

約数の個数: 160

約数和(自身を含む): 75010320

約数和(自身を除く): 54329400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 52, 54, 60, 65, 72, 78, 81, 90, 104, 108, 117, 120, 130, 135, 156, 162, 180, 195, 216, 234, 260, 270, 312, 324, 351, 360, 390, 405, 468, 491, 520, 540, 585, 648, 702, 780, 810, 936, 982, 1053, 1080, 1170, 1404, 1473, 1560, 1620, 1755, 1964, 2106, 2340, 2455, 2808, 2946, 3240, 3510, 3928, 4212, 4419, 4680, 4910, 5265, 5892, 6383, 7020, 7365, 8424, 8838, 9820, 10530, 11784, 12766, 13257, 14040, 14730, 17676, 19149, 19640, 21060, 22095, 25532, 26514, 29460, 31915, 35352, 38298, 39771, 42120, 44190, 51064, 53028, 57447, 58920, 63830, 66285, 76596, 79542, 88380, 95745, 106056, 114894, 127660, 132570, 153192, 159084, 172341, 176760, 191490, 198855, 229788, 255320, 265140, 287235, 318168, 344682, 382980, 397710, 459576, 517023, 530280, 574470, 689364, 765960, 795420, 861705, 1034046, 1148940, 1378728, 1590840, 1723410, 2068092, 2297880, 2585115, 3446820, 4136184, 5170230, 6893640, 10340460, 20680920]

約数ペア:

[(1, 20680920), (2, 10340460), (3, 6893640), (4, 5170230), (5, 4136184), (6, 3446820), (8, 2585115), (9, 2297880), (10, 2068092), (12, 1723410), (13, 1590840), (15, 1378728), (18, 1148940), (20, 1034046), (24, 861705), (26, 795420), (27, 765960), (30, 689364), (36, 574470), (39, 530280), (40, 517023), (45, 459576), (52, 397710), (54, 382980), (60, 344682), (65, 318168), (72, 287235), (78, 265140), (81, 255320), (90, 229788), (104, 198855), (108, 191490), (117, 176760), (120, 172341), (130, 159084), (135, 153192), (156, 132570), (162, 127660), (180, 114894), (195, 106056), (216, 95745), (234, 88380), (260, 79542), (270, 76596), (312, 66285), (324, 63830), (351, 58920), (360, 57447), (390, 53028), (405, 51064), (468, 44190), (491, 42120), (520, 39771), (540, 38298), (585, 35352), (648, 31915), (702, 29460), (780, 26514), (810, 25532), (936, 22095), (982, 21060), (1053, 19640), (1080, 19149), (1170, 17676), (1404, 14730), (1473, 14040), (1560, 13257), (1620, 12766), (1755, 11784), (1964, 10530), (2106, 9820), (2340, 8838), (2455, 8424), (2808, 7365), (2946, 7020), (3240, 6383), (3510, 5892), (3928, 5265), (4212, 4910), (4419, 4680)]