21005445

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{227}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 35020800

約数和(自身を除く): 14015355

約数列:

[1, 3, 5, 15, 31, 93, 155, 199, 227, 465, 597, 681, 995, 1135, 2985, 3405, 6169, 7037, 18507, 21111, 30845, 35185, 45173, 92535, 105555, 135519, 225865, 677595, 1400363, 4201089, 7001815, 21005445]

約数ペア:

[(1, 21005445), (3, 7001815), (5, 4201089), (15, 1400363), (31, 677595), (93, 225865), (155, 135519), (199, 105555), (227, 92535), (465, 45173), (597, 35185), (681, 30845), (995, 21111), (1135, 18507), (2985, 7037), (3405, 6169)]