21325080

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{479}}^1$

素因数の和:553

約数の個数: 128

約数和(自身を含む): 74649600

約数和(自身を除く): 53324520

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 53, 56, 60, 70, 84, 105, 106, 120, 140, 159, 168, 210, 212, 265, 280, 318, 371, 420, 424, 479, 530, 636, 742, 795, 840, 958, 1060, 1113, 1272, 1437, 1484, 1590, 1855, 1916, 2120, 2226, 2395, 2874, 2968, 3180, 3353, 3710, 3832, 4452, 4790, 5565, 5748, 6360, 6706, 7185, 7420, 8904, 9580, 10059, 11130, 11496, 13412, 14370, 14840, 16765, 19160, 20118, 22260, 25387, 26824, 28740, 33530, 40236, 44520, 50295, 50774, 57480, 67060, 76161, 80472, 100590, 101548, 126935, 134120, 152322, 177709, 201180, 203096, 253870, 304644, 355418, 380805, 402360, 507740, 533127, 609288, 710836, 761610, 888545, 1015480, 1066254, 1421672, 1523220, 1777090, 2132508, 2665635, 3046440, 3554180, 4265016, 5331270, 7108360, 10662540, 21325080]

約数ペア:

[(1, 21325080), (2, 10662540), (3, 7108360), (4, 5331270), (5, 4265016), (6, 3554180), (7, 3046440), (8, 2665635), (10, 2132508), (12, 1777090), (14, 1523220), (15, 1421672), (20, 1066254), (21, 1015480), (24, 888545), (28, 761610), (30, 710836), (35, 609288), (40, 533127), (42, 507740), (53, 402360), (56, 380805), (60, 355418), (70, 304644), (84, 253870), (105, 203096), (106, 201180), (120, 177709), (140, 152322), (159, 134120), (168, 126935), (210, 101548), (212, 100590), (265, 80472), (280, 76161), (318, 67060), (371, 57480), (420, 50774), (424, 50295), (479, 44520), (530, 40236), (636, 33530), (742, 28740), (795, 26824), (840, 25387), (958, 22260), (1060, 20118), (1113, 19160), (1272, 16765), (1437, 14840), (1484, 14370), (1590, 13412), (1855, 11496), (1916, 11130), (2120, 10059), (2226, 9580), (2395, 8904), (2874, 7420), (2968, 7185), (3180, 6706), (3353, 6360), (3710, 5748), (3832, 5565), (4452, 4790)]