21023289

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 36990720

約数和(自身を除く): 15967431

約数列:

[1, 3, 7, 9, 21, 29, 37, 63, 87, 111, 203, 259, 261, 311, 333, 609, 777, 933, 1073, 1827, 2177, 2331, 2799, 3219, 6531, 7511, 9019, 9657, 11507, 19593, 22533, 27057, 34521, 63133, 67599, 80549, 81171, 103563, 189399, 241647, 333703, 568197, 724941, 1001109, 2335921, 3003327, 7007763, 21023289]

約数ペア:

[(1, 21023289), (3, 7007763), (7, 3003327), (9, 2335921), (21, 1001109), (29, 724941), (37, 568197), (63, 333703), (87, 241647), (111, 189399), (203, 103563), (259, 81171), (261, 80549), (311, 67599), (333, 63133), (609, 34521), (777, 27057), (933, 22533), (1073, 19593), (1827, 11507), (2177, 9657), (2331, 9019), (2799, 7511), (3219, 6531)]