21508960

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^3\times {\mathrm{101}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 56445984

約数和(自身を除く): 34937024

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 101, 110, 121, 160, 176, 202, 220, 242, 352, 404, 440, 484, 505, 605, 808, 880, 968, 1010, 1111, 1210, 1331, 1616, 1760, 1936, 2020, 2222, 2420, 2662, 3232, 3872, 4040, 4444, 4840, 5324, 5555, 6655, 8080, 8888, 9680, 10648, 11110, 12221, 13310, 16160, 17776, 19360, 21296, 22220, 24442, 26620, 35552, 42592, 44440, 48884, 53240, 61105, 88880, 97768, 106480, 122210, 134431, 177760, 195536, 212960, 244420, 268862, 391072, 488840, 537724, 672155, 977680, 1075448, 1344310, 1955360, 2150896, 2688620, 4301792, 5377240, 10754480, 21508960]

約数ペア:

[(1, 21508960), (2, 10754480), (4, 5377240), (5, 4301792), (8, 2688620), (10, 2150896), (11, 1955360), (16, 1344310), (20, 1075448), (22, 977680), (32, 672155), (40, 537724), (44, 488840), (55, 391072), (80, 268862), (88, 244420), (101, 212960), (110, 195536), (121, 177760), (160, 134431), (176, 122210), (202, 106480), (220, 97768), (242, 88880), (352, 61105), (404, 53240), (440, 48884), (484, 44440), (505, 42592), (605, 35552), (808, 26620), (880, 24442), (968, 22220), (1010, 21296), (1111, 19360), (1210, 17776), (1331, 16160), (1616, 13310), (1760, 12221), (1936, 11110), (2020, 10648), (2222, 9680), (2420, 8888), (2662, 8080), (3232, 6655), (3872, 5555), (4040, 5324), (4444, 4840)]