21282261

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{373}}^1$

素因数の和:426

約数の個数: 64

約数和(自身を含む): 40212480

約数和(自身を除く): 18930219

約数列:

[1, 3, 7, 11, 13, 19, 21, 33, 39, 57, 77, 91, 133, 143, 209, 231, 247, 273, 373, 399, 429, 627, 741, 1001, 1119, 1463, 1729, 2611, 2717, 3003, 4103, 4389, 4849, 5187, 7087, 7833, 8151, 12309, 14547, 19019, 21261, 28721, 33943, 49609, 53339, 57057, 77957, 86163, 92131, 101829, 148827, 160017, 233871, 276393, 373373, 545699, 644917, 1013441, 1120119, 1637097, 1934751, 3040323, 7094087, 21282261]

約数ペア:

[(1, 21282261), (3, 7094087), (7, 3040323), (11, 1934751), (13, 1637097), (19, 1120119), (21, 1013441), (33, 644917), (39, 545699), (57, 373373), (77, 276393), (91, 233871), (133, 160017), (143, 148827), (209, 101829), (231, 92131), (247, 86163), (273, 77957), (373, 57057), (399, 53339), (429, 49609), (627, 33943), (741, 28721), (1001, 21261), (1119, 19019), (1463, 14547), (1729, 12309), (2611, 8151), (2717, 7833), (3003, 7087), (4103, 5187), (4389, 4849)]