21689360

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{503}}^1$

素因数の和:541

約数の個数: 120

約数和(自身を含む): 64120896

約数和(自身を除く): 42431536

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 80, 88, 98, 110, 112, 140, 154, 176, 196, 220, 245, 280, 308, 385, 392, 440, 490, 503, 539, 560, 616, 770, 784, 880, 980, 1006, 1078, 1232, 1540, 1960, 2012, 2156, 2515, 2695, 3080, 3521, 3920, 4024, 4312, 5030, 5390, 5533, 6160, 7042, 8048, 8624, 10060, 10780, 11066, 14084, 17605, 20120, 21560, 22132, 24647, 27665, 28168, 35210, 38731, 40240, 43120, 44264, 49294, 55330, 56336, 70420, 77462, 88528, 98588, 110660, 123235, 140840, 154924, 193655, 197176, 221320, 246470, 271117, 281680, 309848, 387310, 394352, 442640, 492940, 542234, 619696, 774620, 985880, 1084468, 1355585, 1549240, 1971760, 2168936, 2711170, 3098480, 4337872, 5422340, 10844680, 21689360]

約数ペア:

[(1, 21689360), (2, 10844680), (4, 5422340), (5, 4337872), (7, 3098480), (8, 2711170), (10, 2168936), (11, 1971760), (14, 1549240), (16, 1355585), (20, 1084468), (22, 985880), (28, 774620), (35, 619696), (40, 542234), (44, 492940), (49, 442640), (55, 394352), (56, 387310), (70, 309848), (77, 281680), (80, 271117), (88, 246470), (98, 221320), (110, 197176), (112, 193655), (140, 154924), (154, 140840), (176, 123235), (196, 110660), (220, 98588), (245, 88528), (280, 77462), (308, 70420), (385, 56336), (392, 55330), (440, 49294), (490, 44264), (503, 43120), (539, 40240), (560, 38731), (616, 35210), (770, 28168), (784, 27665), (880, 24647), (980, 22132), (1006, 21560), (1078, 20120), (1232, 17605), (1540, 14084), (1960, 11066), (2012, 10780), (2156, 10060), (2515, 8624), (2695, 8048), (3080, 7042), (3521, 6160), (3920, 5533), (4024, 5390), (4312, 5030)]