21054825

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{181}}^1$

素因数の和:255

約数の個数: 72

約数和(自身を含む): 42247296

約数和(自身を除く): 21192471

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 47, 55, 75, 99, 141, 165, 181, 225, 235, 275, 423, 495, 517, 543, 705, 825, 905, 1175, 1551, 1629, 1991, 2115, 2475, 2585, 2715, 3525, 4525, 4653, 5973, 7755, 8145, 8507, 9955, 10575, 12925, 13575, 17919, 23265, 25521, 29865, 38775, 40725, 42535, 49775, 76563, 89595, 93577, 116325, 127605, 149325, 212675, 280731, 382815, 447975, 467885, 638025, 842193, 1403655, 1914075, 2339425, 4210965, 7018275, 21054825]

約数ペア:

[(1, 21054825), (3, 7018275), (5, 4210965), (9, 2339425), (11, 1914075), (15, 1403655), (25, 842193), (33, 638025), (45, 467885), (47, 447975), (55, 382815), (75, 280731), (99, 212675), (141, 149325), (165, 127605), (181, 116325), (225, 93577), (235, 89595), (275, 76563), (423, 49775), (495, 42535), (517, 40725), (543, 38775), (705, 29865), (825, 25521), (905, 23265), (1175, 17919), (1551, 13575), (1629, 12925), (1991, 10575), (2115, 9955), (2475, 8507), (2585, 8145), (2715, 7755), (3525, 5973), (4525, 4653)]