21002865

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:170

約数の個数: 64

約数和(自身を含む): 38610432

約数和(自身を除く): 17607567

約数列:

[1, 3, 5, 13, 15, 37, 39, 41, 65, 71, 111, 123, 185, 195, 205, 213, 355, 481, 533, 555, 615, 923, 1065, 1443, 1517, 1599, 2405, 2627, 2665, 2769, 2911, 4551, 4615, 7215, 7585, 7881, 7995, 8733, 13135, 13845, 14555, 19721, 22755, 34151, 37843, 39405, 43665, 59163, 98605, 102453, 107707, 113529, 170755, 189215, 295815, 323121, 512265, 538535, 567645, 1400191, 1615605, 4200573, 7000955, 21002865]

約数ペア:

[(1, 21002865), (3, 7000955), (5, 4200573), (13, 1615605), (15, 1400191), (37, 567645), (39, 538535), (41, 512265), (65, 323121), (71, 295815), (111, 189215), (123, 170755), (185, 113529), (195, 107707), (205, 102453), (213, 98605), (355, 59163), (481, 43665), (533, 39405), (555, 37843), (615, 34151), (923, 22755), (1065, 19721), (1443, 14555), (1517, 13845), (1599, 13135), (2405, 8733), (2627, 7995), (2665, 7881), (2769, 7585), (2911, 7215), (4551, 4615)]