21842457

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4211}}^1$

素因数の和:4253

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 15897063

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 247, 273, 399, 741, 1729, 4211, 5187, 12633, 29477, 54743, 80009, 88431, 164229, 240027, 383201, 560063, 1040117, 1149603, 1680189, 3120351, 7280819, 21842457]

約数ペア:

[(1, 21842457), (3, 7280819), (7, 3120351), (13, 1680189), (19, 1149603), (21, 1040117), (39, 560063), (57, 383201), (91, 240027), (133, 164229), (247, 88431), (273, 80009), (399, 54743), (741, 29477), (1729, 12633), (4211, 5187)]