21003664

素因数分解:

$2^4\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{571}}^1$

素因数の和:620

約数の個数: 60

約数和(自身を含む): 47167120

約数和(自身を除く): 26163456

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 44, 76, 88, 121, 152, 176, 209, 242, 304, 418, 484, 571, 836, 968, 1142, 1672, 1936, 2284, 2299, 3344, 4568, 4598, 6281, 9136, 9196, 10849, 12562, 18392, 21698, 25124, 36784, 43396, 50248, 69091, 86792, 100496, 119339, 138182, 173584, 238678, 276364, 477356, 552728, 954712, 1105456, 1312729, 1909424, 2625458, 5250916, 10501832, 21003664]

約数ペア:

[(1, 21003664), (2, 10501832), (4, 5250916), (8, 2625458), (11, 1909424), (16, 1312729), (19, 1105456), (22, 954712), (38, 552728), (44, 477356), (76, 276364), (88, 238678), (121, 173584), (152, 138182), (176, 119339), (209, 100496), (242, 86792), (304, 69091), (418, 50248), (484, 43396), (571, 36784), (836, 25124), (968, 21698), (1142, 18392), (1672, 12562), (1936, 10849), (2284, 9196), (2299, 9136), (3344, 6281), (4568, 4598)]