21490740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{179}}^1$

素因数の和:246

約数の個数: 144

約数和(自身を含む): 70761600

約数和(自身を除く): 49270860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 29, 30, 36, 45, 46, 58, 60, 69, 87, 90, 92, 115, 116, 138, 145, 174, 179, 180, 207, 230, 261, 276, 290, 345, 348, 358, 414, 435, 460, 522, 537, 580, 667, 690, 716, 828, 870, 895, 1035, 1044, 1074, 1305, 1334, 1380, 1611, 1740, 1790, 2001, 2070, 2148, 2610, 2668, 2685, 3222, 3335, 3580, 4002, 4117, 4140, 5191, 5220, 5370, 6003, 6444, 6670, 8004, 8055, 8234, 10005, 10382, 10740, 12006, 12351, 13340, 15573, 16110, 16468, 20010, 20585, 20764, 24012, 24702, 25955, 30015, 31146, 32220, 37053, 40020, 41170, 46719, 49404, 51910, 60030, 61755, 62292, 74106, 77865, 82340, 93438, 103820, 119393, 120060, 123510, 148212, 155730, 185265, 186876, 233595, 238786, 247020, 311460, 358179, 370530, 467190, 477572, 596965, 716358, 741060, 934380, 1074537, 1193930, 1432716, 1790895, 2149074, 2387860, 3581790, 4298148, 5372685, 7163580, 10745370, 21490740]

約数ペア:

[(1, 21490740), (2, 10745370), (3, 7163580), (4, 5372685), (5, 4298148), (6, 3581790), (9, 2387860), (10, 2149074), (12, 1790895), (15, 1432716), (18, 1193930), (20, 1074537), (23, 934380), (29, 741060), (30, 716358), (36, 596965), (45, 477572), (46, 467190), (58, 370530), (60, 358179), (69, 311460), (87, 247020), (90, 238786), (92, 233595), (115, 186876), (116, 185265), (138, 155730), (145, 148212), (174, 123510), (179, 120060), (180, 119393), (207, 103820), (230, 93438), (261, 82340), (276, 77865), (290, 74106), (345, 62292), (348, 61755), (358, 60030), (414, 51910), (435, 49404), (460, 46719), (522, 41170), (537, 40020), (580, 37053), (667, 32220), (690, 31146), (716, 30015), (828, 25955), (870, 24702), (895, 24012), (1035, 20764), (1044, 20585), (1074, 20010), (1305, 16468), (1334, 16110), (1380, 15573), (1611, 13340), (1740, 12351), (1790, 12006), (2001, 10740), (2070, 10382), (2148, 10005), (2610, 8234), (2668, 8055), (2685, 8004), (3222, 6670), (3335, 6444), (3580, 6003), (4002, 5370), (4117, 5220), (4140, 5191)]