21000238

素因数分解:

$2^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{571}}^1$

素因数の和:688

約数の個数: 32

約数和(自身を含む): 37559808

約数和(自身を除く): 16559570

約数列:

[1, 2, 7, 14, 37, 71, 74, 142, 259, 497, 518, 571, 994, 1142, 2627, 3997, 5254, 7994, 18389, 21127, 36778, 40541, 42254, 81082, 147889, 283787, 295778, 567574, 1500017, 3000034, 10500119, 21000238]

約数ペア:

[(1, 21000238), (2, 10500119), (7, 3000034), (14, 1500017), (37, 567574), (71, 295778), (74, 283787), (142, 147889), (259, 81082), (497, 42254), (518, 40541), (571, 36778), (994, 21127), (1142, 18389), (2627, 7994), (3997, 5254)]