21209565

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{4729}}^1$

素因数の和:4773

約数の個数: 32

約数和(自身を含む): 38142720

約数和(自身を除く): 16933155

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 195, 299, 345, 897, 1495, 4485, 4729, 14187, 23645, 61477, 70935, 108767, 184431, 307385, 326301, 543835, 922155, 1413971, 1631505, 4241913, 7069855, 21209565]

約数ペア:

[(1, 21209565), (3, 7069855), (5, 4241913), (13, 1631505), (15, 1413971), (23, 922155), (39, 543835), (65, 326301), (69, 307385), (115, 184431), (195, 108767), (299, 70935), (345, 61477), (897, 23645), (1495, 14187), (4485, 4729)]