21404040

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{307}}^1$

素因数の和:411

約数の個数: 128

約数和(自身を含む): 74511360

約数和(自身を除く): 53107320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 83, 84, 105, 120, 140, 166, 168, 210, 249, 280, 307, 332, 415, 420, 498, 581, 614, 664, 830, 840, 921, 996, 1162, 1228, 1245, 1535, 1660, 1743, 1842, 1992, 2149, 2324, 2456, 2490, 2905, 3070, 3320, 3486, 3684, 4298, 4605, 4648, 4980, 5810, 6140, 6447, 6972, 7368, 8596, 8715, 9210, 9960, 10745, 11620, 12280, 12894, 13944, 17192, 17430, 18420, 21490, 23240, 25481, 25788, 32235, 34860, 36840, 42980, 50962, 51576, 64470, 69720, 76443, 85960, 101924, 127405, 128940, 152886, 178367, 203848, 254810, 257880, 305772, 356734, 382215, 509620, 535101, 611544, 713468, 764430, 891835, 1019240, 1070202, 1426936, 1528860, 1783670, 2140404, 2675505, 3057720, 3567340, 4280808, 5351010, 7134680, 10702020, 21404040]

約数ペア:

[(1, 21404040), (2, 10702020), (3, 7134680), (4, 5351010), (5, 4280808), (6, 3567340), (7, 3057720), (8, 2675505), (10, 2140404), (12, 1783670), (14, 1528860), (15, 1426936), (20, 1070202), (21, 1019240), (24, 891835), (28, 764430), (30, 713468), (35, 611544), (40, 535101), (42, 509620), (56, 382215), (60, 356734), (70, 305772), (83, 257880), (84, 254810), (105, 203848), (120, 178367), (140, 152886), (166, 128940), (168, 127405), (210, 101924), (249, 85960), (280, 76443), (307, 69720), (332, 64470), (415, 51576), (420, 50962), (498, 42980), (581, 36840), (614, 34860), (664, 32235), (830, 25788), (840, 25481), (921, 23240), (996, 21490), (1162, 18420), (1228, 17430), (1245, 17192), (1535, 13944), (1660, 12894), (1743, 12280), (1842, 11620), (1992, 10745), (2149, 9960), (2324, 9210), (2456, 8715), (2490, 8596), (2905, 7368), (3070, 6972), (3320, 6447), (3486, 6140), (3684, 5810), (4298, 4980), (4605, 4648)]