21761325

素因数分解:

$3^3\times 5^2\times {\mathrm{103}}^1\times {\mathrm{313}}^1$

素因数の和:435

約数の個数: 48

約数和(自身を含む): 40493440

約数和(自身を除く): 18732115

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 103, 135, 225, 309, 313, 515, 675, 927, 939, 1545, 1565, 2575, 2781, 2817, 4635, 4695, 7725, 7825, 8451, 13905, 14085, 23175, 23475, 32239, 42255, 69525, 70425, 96717, 161195, 211275, 290151, 483585, 805975, 870453, 1450755, 2417925, 4352265, 7253775, 21761325]

約数ペア:

[(1, 21761325), (3, 7253775), (5, 4352265), (9, 2417925), (15, 1450755), (25, 870453), (27, 805975), (45, 483585), (75, 290151), (103, 211275), (135, 161195), (225, 96717), (309, 70425), (313, 69525), (515, 42255), (675, 32239), (927, 23475), (939, 23175), (1545, 14085), (1565, 13905), (2575, 8451), (2781, 7825), (2817, 7725), (4635, 4695)]